The song is 100% and very easy to play.

/= slide
^= bend
P.M.= palm mute
*= coda

riff A


========================================================================
==                       Presidents Of The USA-Lump                   ==
========================================================================


"Lump sits alone in a boggy marsh..."
:-------------------------------------------------------------------:
:-------------------------------------------------------------------:
:-----7/9-----7/9-----7/9----x-x------------------------------------:
:-----7/9-----7/9-----7/9----x-x---7-777----7^--7^--7^--7^--7^------:
:-----5/6-----5/6-----5/6----x-x---7-777----------------------------:
:----------------------------------4/555----------------------------:


riff B
:---------------------------:
:---------------------------:
:-------------7-------------:
:-------2-----7-----5-------:
:-------2-----5-----5-------:
:-------0-----------3-------:
      (16x)  (8x)  (8x)


Chorus

  "Get this lump outta my head..."
:--------------------------------------------*--------------------:
:--------------------------------------------*--------------------:
:--------------------------------------------*--------------------:
:--------------------------------------------*--------------------:
:-2222-2222-2222-----5-6-7----10-11-12-12----*--------------------:
:-0000-0000-0000-----3-4-5----8--9--10-10----*------0-3-5-3-0-----:
 {    P.M.      }


* during last time, play

g:----9-8-7-----|
d:----9-8-7-----|
a:----7-6-5-----|
e:--------------|

                                      Lump
                                   By POT USA


chorus                                              half step  slowly release
--------------------------------------------------------------------------------|
--------------------------------------------------------------------------------|
--------------------------------------------------------------------------------|
--------------------------------------------------------------------------------|
-5-----7-----5-----7-----5-----7--------3--5---------5^-------------------------|
-3-----5-----3-----5-----3-----5--------1--3------------------------------------|

        verse
--------------------------------------------------------------------------------|
--------------------------------------------------------------------------------|
--------------------------------------------------------------------------------|
-----------------------7--------5-----------------------------------------------|
-----------------------5--------3--------3--------------------------------------|
-----------------------------------------1--------------------------------------|


                                 Outro and Interlude
--------------------------------------------------------------------------------|
--------------------------------------------------------------------------------|
--------------------------------------------------------------------------------|
----------------------------------7--------------------------3--4--5------------|
----------------------------------5-----------3--4--5--------1--2--3------------|
----------------------------------------------1--2--3---------------------------|


                                    End to Outro and Interlude
--------------------------------------------------------------------------------|
--------------------------------------------------------------------------------|
--------------------------------------------------------------------------------|
-------------------------------------7--------7--6--5---------------------------|
3--4--3------------------------------5--------5--4--3---------------------------|
1--2--1-------------------------------------------------------------------------|

Well, that is basically the song. Listen to the CD for the rythem and timing.

                                -
ARTIST: The Presidents Of The United States Of America
SONG: Lump
ALBUM: The Presidents Of The United States Of Americ
COMPOSED BY: Chris Ballew, Dave Dederer, and Jason Finn
TUNING: Dropped D down 1/2 step (Db, Ab, Db, Gb, Bb, Eb)

    Verse: Gtr. 1 (Guitar is tacet on 1st Verse)
Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db-----12--12--12--12--12--12--12--12--12--12--12--12--12--12--12--0----|
Ab-----12--12--12--12--12--12--12--12--12--12--12--12--12--12--12--0----|
Db-----12--12--12--12--12--12--12--12--12--12--12--12--12--12--12--0----|


                                                            2x
Eb----------------------------------------------------------||----------|
Bb----------------------------------------------------------||----------|
Gb---------------------------------------------------------*||----------|
Db--10--10--10--10--10--10--10--0--3--3--3--3--3--3--3--0--*||----------|
Ab--10--10--10--10--10--10--10--0--3--3--3--3--3--3--3--0---||----------|
Db--10--10--10--10--10--10--10--0--3--3--3--3--3--3--3--0---||----------|


    Chorus: Gtr. 1
Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db--12-----------10--12--------10--12-----------------------3--/--5-----|
Ab--12--------x--10--12-----x--10--12-----------------------3--/--5-----|
Db--12-----------10--12--------10--12--------x--------16\---3--/--5-----|

Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db--5--5-----0--5^--5--5^--5^--7/10-----0--10--12--------10--12---------|
Ab--5--5--------------------------------0--10--12--------10--12---------|
Db--5--5--------------------------------0--10--12--------10--12---------|

Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db-----10--12-------------------3--/--5--5--5-----0--5^-----5^^--5------|
Ab-----10--12-------------------3--/--5--5--5---------------------------|
Db-----10--12-----------(18)\---3--/--5--5--5---------------------------|

Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db--^--5/9--0-----------------------------------------------------------|
Ab----------0-----------------------------------------------------------|
Db----------0-----------------------------------------------------------|


    Interlude: Gtr. 1
Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db--12--12--12--10--12--12--12--10--12--12--12--10--12--\--3--4--5------|
Ab--12--12--12--10--12--12--12--10--12--12--12--10--12--\--3--4--5------|
Db--12--12--12--10--12--12--12--10--12--12--12--10--12--\--3--4--5------|

Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db-----5--5--/--8-----8--9--10-----10--\--0--3--5--3--0--12-----3--5----|
Ab-----5--5--/--8-----8--9--10-----10--\--0--3--5--3--0--12-------------|
Db-----5--5--/--8-----8--9--10-----10--\--0--3--5--3--0--12--0----------|

Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db--^--3-----3--3--0--------------10--\--7--\--3-----3-----0-----10-----|
Ab--------5--0--0-----3-----5--5--10--\--7--\--3-----3-----0-----10-----|
Db--------------------0-----------10--\--7--\--3-----3-----0-----10-----|


                               Play Verse & Chorus Again
Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db--\--3--3-----0--3--5--3--0-------------------------------------------|
Ab--\--3--3-----0--3--5--3--0-------------------------------------------|
Db--\--3--3-----0--3--5--3--0-------------------------------------------|


    Outro: Gtr. 1
Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db-----------------------------------------3--4--5-----5--/--x-----8----|
Ab--5--5--5--3--5--5--5--3--5--5--5--3--5--3--4--5-----5--/--x-----8----|
Db--0--0--0--0--0--0--0--0--0--0--0--0--0--3--4--5-----5--/--x-----8----|

Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db--9--10-----10--\--0--3--5--3--0--------------------------------------|
Ab--9--10-----10--\--0--3--5--3--0--5--5--5--3--5--5--5--3--5--5--5-----|
Db--9--10-----10--\--0--3--5--3--0--0--0--0--0--0--0--0--0--0--0--0-----|

Eb----------------------------------------------------------------------|
Bb----------------------------------------------------------------------|
Gb----------------------------------------------------------------------|
Db-----------12-----11-----10-------------------------------------------|
Ab--5--------12-----11-----10-------------------------------------------|
Db--0--------12-----11-----10-------------------------------------------|