GWAR tunes their guitars 1/2 step down, but I'm too lazy so this is on normal tuning:
Main Riff
G------------------------1------|
D---------------------1-3---1---|
A----------0------2-------------|
E-0-2-000-2--000-2--------------|
Bridge
G-----------------------------|
D-----------------------------|
A-----------------------------|
E--555556--5553--555556-3-0-2-|
Chorus
G-------------|
D--------3-2--|
A----3-5------|
E--5----------|
For the chorus, the A on the E-string is sometimes played twice.
That's it. Not the most accurate, but tis fun and will get you through most of the tune.