There's probably more to it than this but it's a fun song to sing and even better when 
can play along, I didn't see it done yet so here it is.

Intro

    D D       D D       D D       D
e|------------------------------------|
B|------------------------------------|
G|--7-7-------7-7-------7-7-------7---|
D|--7-7-------7-7-------7-7-------7---|
A|--5-5-------5-5-------5-5-------5---|
E|------------------------------------|


VERSE (upstrokes and such)

   D  D  D  D  A# A# F  F
e|-5--5--5--5--6--6--8--8-------------|
B|-7--7--7--7--6--6--10-10------------|
G|-7--7--7--7--7--7--10-10------------|
D|-7--7--7--7--8--8--10-10------------|
A|-5--5--5--5--8--8--8--8-------------| x2
E|-------------6--6-------------------|

Chorus (not upstrokes and such)

   D A A#F           D A A#F
e|-----------------|------------------|
B|-----------------|------------------|
G|-7---------------|-7-7---10---------|
D|-7-7-8-3---------|-7-7-8-10---------|
A|-5-7-8-3---------|-5-7-8-8----------| x2
E|---5-6-1---------|---5-6------------|


Verse x2

Chorus x2

Verse x2


FUCK THE PIGS

e|------------------------------------|
B|------------------------------------|
G|-7-77-7-77-7-77-7-77-7-77-7-77-7-77-|
G|-7-77-7-77-7-77-7-77-7-77-7-77-7-77-|
A|-5-55-5-55-5-55-5-55-5-55-5-55-5-55-|
E|------------------------------------|

e|------------------------------------|
B|------------------------------------|
G|-77777777777777-55-7777777777777-55-|
D|-77777777777777-55-7777777777777-55-|
A|-55555555555555-33-5555555555555-33-|
E|------------------------------------|


Chorus x2

Verse x2

Chorus x2

End on
e|----|
B|----|
G|-7--|
D|-7--|
A|-5--|
E|----|