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 Eaton Holgoode June 24, 2009
1.When you uncle fists you and your sibling at the same time.
2. When your uncle literally punches your ass hole into the next dimension.
2. When your uncle literally punches your ass hole into the next dimension.
"I hate my Uncles knuckles"
by gmoney2904 December 8, 2017