unclefucker 

One who engages in the act of coitus with the brother of his father or mother

"You're an unclefucker that is true, no one fucks uncle quite like you!"

unclefucker by Horatio Nelson April 17, 2003

unclefucker 

a term used by canadians to refer to george w. bush

hey fellahs the unclefucker and dick cheney are on tv again!

unclefucker by unkle fucka October 31, 2003

UncleFucker 

A man who has sexual intercourse with his uncle

That guy is such an unclefucker

UncleFucker by YOUARESTUPIDDDDD January 12, 2018

Unclefucker 

Someone who makes it look like an accident when they send their uncle a dirty text.

Unclefucker- So do you want to scrog later? Whoops, that was meant to go to my girl/guy. This is embarassing.

Unclefucker's uncle- You knew who you were sending that to, and you know I'm not interested.

Unclefucker by Solid Mantis July 13, 2020

Ass-ramming-unclefucker

One who fucks his uncle (and others) in the ass.

You are such an Ass-ramming-unclefucker

Ass-ramming-unclefucker by Fjell February 17, 2008

Uncle Fucker 

A fuck-ass fuckin' funny song that was sung by Terrence and Phillip in the movie Terrence and Phillip Asses of Fire that was shown in the movie South Park: Bigger, Longer, and Uncut.

Terrence: Shut your fucking face uncle fucker
Your a cock-sucking ass-licking
uncle fucker
Your an uncle fucker yes its true Nobody fucks uncles quite like you

Phillip: Shut your fucking face uncle fucker
Your the one who fucks your uncle uncle fucker
You dont eat or sleep or mow the lawn You just fuck your uncle all day long

(farting sounds)

Mountie: What's going on here

(Farting sounds)

People in background: Uncle fucker x5

Terrence and Phillip: Shut your fucking face uncle fucker
Your a boner biting bastard uncle fucker

Terrence: Your an uncle fucker i must say

Phillip: Well you fucked your uncle yesterday

Terrence and Phillip: AAAHAHAHAHAAA!!!!
Uncle fuuuuucker
That's u-n-c-l-e fuck you uncle Fuckerrrrrr!!!!!!

Phillip: Suck my balls

Uncle Fucker by weeeeeeeeee August 9, 2005

uncle fucker 

funny as fuck song by terrence and phillip

shut your fucking face uncle fucker
your a boner biting bastard uncle fucker
your an uncle fucker yes its true
nobody fucks uncles quite like you
shut your fucking face uncle fucker
your the one who fucks your uncle uncle fucker
you dont eat or sleep or mow the lawn you just fuck your uncle all day long
*farting bit*
shut your fucking face uncle fucker
your a boner biting bastard uncle fucker
your an uncle fucker i must say
you fucked your uncle yesterday
AAAAHAHAHAHAAAA!!!!
uncle fucker
thats u-n-c-l-e fuck you uncle fuckerrrrrr!!!!!! suckmyballs

ok now im showing off lol

uncle fucker by lewis May 1, 2004