fucknuckle

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