The beginning part is just open chords:

C    Am

The second part (with distortion, all chords are now power chords)

B           B      A  G  F#  D
Now it's gone away so long

starting on that last D this part repeats throughout most of the rest of the
song

D   Bb   C   G

play that twice and instead of the G the second time do a pick slide

then repeat it until

Bb
Where's my t-shirt?

C
Where's my money?

D                Bb  Bb  Bb
*** you...and your cat

-Stig-