Someone who is the odd man out. And is usually displaying strange behavior. Often he is a fag.
1. Wow that new kid Joe is weird huh? What a buttknuckler 2. You ruin everything, don't be such a buttknuckler.
by SourSack Attack July 11, 2010
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hot sauce, bbq sauce, and dry rub from youngstown ohio. usually consists of various types of hot peppers mixed with fruits and/or vegetables to make your buttknuckle sweat.
I bbq'ed yesterday and used buttknuckle hot bbq sauce and today i had to use tucks cuz my ass is dripping habanero juice
by Gravestone April 14, 2008
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buttknuckle-
the knuckle of your arse.

perverts
the guy who cried donkey
an ostriche's pine cone
the alphabet's squiggle
a mushroom's dick
the wiggles
magenta from blue's clues
muno from yo gabba gabba
"ow! i hurt my buttknuckle when i fell on my arse!"

"that guy just looked at my boobs and drooled out of his dick"
by dj lance July 12, 2011
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Singular: Noun: hip bones that protrude like knuckles when a girl is bent over; Most apparent on skinny girls.
During doggie-style sex, a woman's buttknuckles can diminish the sexual experience.
by pullon7 February 4, 2010
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1. Somebody with a mood disorder, such as Bipolar Disorder.

2. A person who is culturally and/or racially prejudiced.
1. My wife is a buttknuckle. She belongs in a mental hospital.

2. I ran into a couple of buttknuckles in the ghetto today. I saw them throwing beer bottles at a black person's house.
by JushtinSmeagol March 13, 2011
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The scienctifical term for the end of your butt bone.
I broke my buttknucle.
Uhh.. either i sat on a waterbottle or i just broke my buttknuckle.
by Rikki, Ryleigh June 22, 2009
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