a wanker, an idiot, a jack-off. technically someone who fucks their knuckle, i.e. their hand.
instead of calling someone "fuckin' wanker" or "jack-off", you might call them "fucknuckle" - quite offensive.
by Macalito January 26, 2006
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n.used to describe someone who is an arsehole or is very stupid. mainly used in australia and newzealand, as far as i know. a negative desription of said person.
similar to fucktard
the coupling of two english words fuck and knuckle
'john howard is a fucknuckle'
'yeah,what a fucknuckle'
by leader for the opposition October 25, 2006
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Fuck off Howard you pillow-biting fucknuckle
by Anonymous April 20, 2003
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A stupid or repungnant person. (20th cent origin - possibly Australian)
"Pshaw! You truly are are fucknucle, Prime Minister Howard!"
by Schteve March 17, 2003
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A person who is really annoying, basically a fun way of saying a dickhead.
Maria kept following me so I called her a fucknuckle.
by nyommmmm April 8, 2016
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The diagonal slice on the top of the corner pocket on a pool table.
I would have cleared up if I hadn't hit the fucknuckle
by Marky Marky Pritchmeister August 30, 2005
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