This rap is from Y.V. Mansion (secret level on Scrapyard).

 - Y.V.:
It's the
Dead body lootin', mutant shootin' Venus youthin',
Rootin' tootin', Luger [bad word] loadin',
Bullet throwin', way too long grenade holdin',
Triangle, I might mangle your weapon to rap,
Flash color coded clips and an RPG hat,
Baby, baby, blue ammo turn red when it clap,
Shoot your face in the fat, get a cadaver slap,
Where the level boss at?
I wanna click-click-clack k'pow, click-click-click-clack that.

I see him, shoot him, skin him, wear him, mount him on the wall, [bad word] armor plated, I'ma shoot it in the
Baaaalllin', like a black hole, a vulture flock,
You violently challenge, your thangs don't [bad word] 
Your things get shot, your party stopped,
When I roll up Teen Wolfin' on the ambulance top,
This ain't no game, ain't never been no show,
And I'll gladly gun down the oldest lady you know.
 [bad word] (Repeats 2x) 
 - Y.V.:
I don't need no friends, I don't need no phone,
Just a bag of severed head and my Nuclear Throne,
 - Fish:
Me no believe in trends, me no believe in genome,
All me be believe in is the Nuclear Throne,
 - Y.V.:
I don't need no brand, I don't need no home,
Just everybody dead and my Nuclear Throne,
 - Fish:
Me kill you out of nowhere, me kill you all alone,
Me kill you in the face for my Nuclear Throne.

 - Fish:
Trouble don't wanna, you me gon' gun down your mama,
We be for fun kill a llama, do-donkey zebra piranha,
Me ride giraffe up on toppa and go "Jahada matata",
Who want a piece of the guy who got da horse meat off de schwarma?
I'm gonna shoot you in the morning, get your blood on my eggs,
Shoot you in the hand, head, face, chest, neck, legs,
At Chrismahanzakwanukah him hide unda' tree, 
(Boo!) Jump out minigunnin' down your fat family,
Wanna spell a good time to me, it's M-U-R-D,
E-R-N-O-N-S-T-O-P, you don't wanna be-hee-hee-hee,
Ya booty a shooty, better than good nudie movie,
To me a gun and a cookie, hot like the [bad word] 
 [bad word] (Repeats 2x) 
 - Y.V.:
I don't need no friends, I don't need no phone,
Just a bag of severed head and my Nuclear Throne,
 - Fish:
Me no believe in trends, me no believe in genome,
All me be believe in is the Nuclear Throne,
 - Y.V.:
I don't need no brand, I don't need no home,
Just everybody dead and my Nuclear Throne,
 - Fish:
Me kill you out of nowhere, me kill you all alone,
Me kill you in the face for my Nuclear Throne.

Lyrics by The Internet.