The knuckle of the hand that was used to fist the dirty asshole of another man
This particular knuckle on this particular hand has seen more ass than you will in your entire life-a genuine fuck-knuckle
Fuck knuckles are when a teenage boy has been masterbating and constantly has jizz on his knuckles
I will never shake hands with my nephew Johnny because he constantly has fuck knuckles and seems to be always jacking off.
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a fuck knuckle is like a dick knuckle or a fucktard
basically its a person that has the IQ of a swamp flea
dude ur a fuck knuckle shut the fuck up!!
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a large mass around the penis. resulting from torn blood vessels when a penis is "broken" or bent while erect. often referred to as dick gristle.
he had a fuck knuckle in the middle of his penis.
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Someone driving at such a low rate of speed as to piss off the driver of the huge truck behind them. Usually used to verbally encourage said person to hurry the fuck up.
"Let's go there, fuck knuckle."
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How you say you want to bang and fuck your shit up at the same time.
Bitch, I wanna give you some good ole fashioned fuck knuckles.
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