original tuning on the record is one step up:
F Bb D# G# C F

Chords used:
--------------
       EADGBe
A     (x02220)
D     (xx0232)
G     (320033)
F#m7  (3xx220) - not sure about the name of this chord!
Bm    (224432)
C     (x32010)
E     (022100)
F#/D  (200033)

NOTE: Not too sure about Bm in the chorus - 
sounds okay, but G chord works pretty fine as well???
couldn't figure that out myself, so play whatever you feel like the best!

Intro (same as verses):

D  F#m7  G   D      
                        four times
G  G     A   D

(Little melody played along with intro and verses)

e|---------------------------------||
B|--15--14--12--10--8--8-----------||
G|------------------------9--9s11--||
D|---------------------------------||
A|---------------------------------||
E|---------------------------------||

Verse 1:

D           F#m7              G                D
Down in the workshop all the elves were making toys
        G            G              A           D
For the good Gentile girls and the good Gentile boys
         D           F#m7       G                  D
When the boss busted in, nearly scared 'em half to death
         G            G               A              D
He had a rifle in his hands and cheap whiskey on his breath

Verse 2:

From his beard to his boots, he was covered in ammo
Like a big, fat, drunk, disgruntled, Yuletide Rambo
And he smiled as he said, with a twinkle in his eye,
"Merry Christmas to all! Now you're all gonna die!"

Chorus:

Bm  D     Bm         D
The night Santa went crazy
Bm  D           A         D
The night Saint Nick went insane
Bm D               Bm        D
Realized he'd been getting a raw deal
Bm        D                 A              D
Something finally must have snapped in his brain

Verse 3:

Well, the workshop is gone now, he decided to bomb it
Everywhere you'll find pieces of Cupid and Comet
And he tied up his helpers and he held the elves hostage
And he ground up poor Rudolph into reindeer sausage

Pre-chorus 1:

D
He got Dasher and Dancer with an old German luger
       G       F#/D            A          D
And he slashed up Dasher just like Freddy Kreuger
D
And he picked up a flamethrower and he barbecued Blitzen
       G        F#/D              A                   D
And he took a big bite, and said "It tastes just like chicken!"