I got this tab off some joker and he had some parts wrong!
here is an updated better version. Enjoy!

If any thing is Wrong...fix it yourself.

Standard Tuning

D?-G              F       G           D                        On A Plain - Nirvana
I'll start this off with out any word
G       F      G                     D
Got so high I scratched till it blead

Bridge
C    B       A      D         G           F         G             D
Love myself, Better than you, I know it's wrong so what should I do?

G       F      G                     D
The finest day that I ever had
G       F      G                     D
Was when I learned to cry on comand
        D     G         F
Bridge: DOOOOOOOOOOOOOOOO

Chorus
F        D       G     F  
I'm on a plain (oooooooooooooo)
F        D        G       F     P
I can't complain (ooooooooooooooo)
F        D       G          F
I'm on a Plain (ooooooooooooooo)

D?-G       F       G    D
My brother died every night
G       F      G                     D
It's safe to say don't quote me on that

Bridge

D?-G       F       G    D
The black sheep got black mailed again
G       F      G                     D
Forgot to put on the zip code
        D     G         F
Bridge: DOOOOOOOOOOOOOOOOOOO

Chorus
F         E                  A        G
Some where I have heard this before
F         E                  A        G
In A dream my memories restored
F         E                  A        G
In defense I'm nuterd and spade
F         E                  A        G
What the hell am I trying to say?

G four down strokes then pause with bass riff

D?-G              F       G           D
Now it's time to make it unclear
G       F      G                     D
To write off lines that don't make sense
Bridge

D   G            F
One more special message to go
D    G            F
Then I'm done and I can go home

Bridge: DOOOOOOOOOOOOO

Chorus

MMMMMMMhmmmmmmmmmm-| X3