"Santo" is still one of my favorite Pixies songs. I could never find a tab of it, so I made my own a few years ago. All I tried to do was make it sound decent enough to sing along with an acoustic. It may not be totally faithful to the record, but it's a start...
INTRO:
(1x)
G----0-0-0-0---0-0-0----
D--2-5-5-4-2---1-1-0----
A------------3-------3--
(3x)
G----0-0-0-0-0---0-0-0----   
D----5-5-5-4-2---1-1-0----   
A--0-----------3-------3--   
VERSE 1:
D--2--2-2-------5-5-5-4---
A--0--3-3-------6-6-6-5---
         By the old seaside
(again with no lyrics)
     Ain't no place far to go I don't know
(again with no lyrics)
   I don't know ain't no place far to go (it's a dollar)
F#                      (N.C.)
She say, "Te amo le mas, te amo le mas"
CHORUS:
A  C D
 Santo
 Santo
 Santo
 Santo
VERSE 2:
D--2--2-2--------------------5-5-5-4---
A--0--3-3--------------------6-6-6-5---
    Hey ya boy, how ya doin', come here boy
(again with no lyrics)
    Here she come a slitherin'
(again with no lyrics)
    Here she come a slitherin' che cha chu
F#                         (N.C.)
Bah che cha, te amo le mas, te amo le mas
CHORUS:
A  C D
 Santo
 Santo
 Santo
 Santo
E             D
Buzzin' eels, buzzer bikinis
B               E
Eat your rouge, a chini wienies
D               B
A warm gordita, de mamacita
F#                 E
A poutin' grandma, in a corner
F             (N.C.)       F
A passin' time--   hey, hey (praying too far to)
CHORUS:
A  C D
 Santo
 Santo
 Santo
A  C F# C  F# A
 Santo