Top Definition
What you say when you fist pound someone after they say something absolutely great

-derived from the term "gimme some knucks" (as in knuckles)

created by a freshman at Grafton High School '09
"Yo I got mad booty last night with this chick I've never met, it was great!"
"Knuck shit up to that brotha!"
by tfitz15 December 07, 2009
4 Words related to knuck shit up

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