is a slang term used by the present day "gangstas" meaning an acknowledgment of ur knowledge of something belonging to them of some worth or "coolness"
Tommy walks into the the local barbershop and his friend Billy says "nice sneakers"!!! Tommy replies with "U kno"
by D Brooks August 25, 2005
by sarena v. July 02, 2007
by Eric Chin 88 November 10, 2013
by #LoL U October 29, 2019
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by WiganLad88 January 20, 2016