CHORUS 1:
C#                             Ab
Twenty-one ways to murder your lover
            B                                  F#
And there's twenty-one ways to kill a girl who lies
    C#                                 Ab
Her twenty-one words haunt you like no others
            B                                      F#
Now there's twenty-one thoughts racing through your mind

All the time

VERSE 1:
C#         B                       F#
I killed a fat girl to prove its a sick world
Ab          F#
Boy was i a lonely one
Ab              F#
Killing her was lots of fun
Ab              F#
Take it from me everyone

CHORUS 2:
C#                             Ab
Twenty-one ways to murder your lover
            B                             F#
And there's twenty-one fine ways to end a life
C#                          Ab
Twenty-one must be my lucky number
     B                            F#
Yes, twenty-one is seventeen plus nine minus five

VERSE 2:
I killed a bad girl to prove its a sick world
Boy was i a lonely one
Killing her was lots of fun
Take it from me everyone

VERSE 3:
I killed a frat girl to prove its a great world
Boy was she a lonely one
Begged me to put down my gun
Killing her was lots of fun

CHORUS 3:
Twenty-one ways to murder your lover
But there's only one way to kill a girl who lies
Get her drunk on a rooftop and just shove her
Tell the cops you weren't there the night she lost her life

VERSE 4:
Act like you're sorry then make up a story
Say she was the only one
Say that you're a lonely one
Killing can be lots of fun

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My first tab (chords?). I took it from the acoustic version from "Disaster at Ray's 
rather than the regular version from "...and for the little children, sing".
All songs and lyrics can be downloaded at their website: http://www.putridflowers.com/home.php