This is a tab based off their original recording
http://www.youtube.com/watch?v=o8YHVQGfFLs

CHORDS:
D   (000232)
A   (002220)
Bm  (224432)
G   (320003)

INTRO:
--2--0--3-3-3-3|
--3--3--3-3-3-3|
--2--2--2-2-2-2| x3
--0--0--0-0-0-0|
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VERSE 1:
D
I swear that someday
A
I'll tell you without lying
      Bm
I was born to quit smoking
      G
I was born to quit dying

VERSE 2:
        D
On that day, not doing heroin
A                   
Will be easy as piss
            Bm
And on that day I'll stop talking so much 
G
shit about the government

CHORUS:
D                               A
'Cause urine speaks louder than words
               Bm
On a politician
                     G
Or on a prison warden

Urine speaks louder than words

VERSE 3:
D
I swear that today
      A
I was born to be living!
      Bm
I was born to be singing!
      G
I was born to be fighting

VERSE 4:
                  D
But will somebody say
                   A
Is this resistance or a costume party?
Bm
Either way I think black
     G
with bandanas is a boring theme

VERSE 5:
D
I don't gotta tell ya
A
Crackers are great with amnesia
Bm
When you wanna forget something like
G
Centuries of racism

VERSE 6:
D
They say look at the man
          A
On center stage and pay no attention
Bm
While millions get locked in a cage
G
Riots break out in Oakland

CHORUS:
D                               A
'Cause urine speaks louder than words
               Bm
On a politician
                      G
Or on a Bart policeman 

Urine speaks louder than words