Top Definition
For a female, Uncle Knuckles is the act of allowing an older male, preferably 10-20 years older than herself, to finger bang her pussy.
Hey Donna. What's the matter? You seem like you are day dreaming. Oh I am. I went to a bar last night and had me an Uncle Knuckles. How was it? He said it was finger licking good.
by Ivana Dickincide June 24, 2009

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