A jackass, dumbshit sort of person, who although tries to be smart about things ends up with their head up their ass.
In Goodfellas DeNiro's character (Jimmy) refers to a couple of feds sleeping in their car as Fucko's. As he taps on the glass to wake them (they have been tailing him) he says: "c'mon fucko's lets go for a ride."
A silly, prank-prone misfit. A jackass, but not in a harmful way. Someone who likes to provoke the status quo.
Twenty fuckos in monkey suits entered the swank upper-class nightclub, screeching and jumping around like rabid orangutans while the well-heeled patrons looked on in a combination of amusement and horror.