Top Definition
A person who prevents a friend from layin' down his game or lays down game on a female that he KNOWS his friend is into, just because he can. See Cockblock or SlickD.
SlickD macks on everyone's chicks. What a walking cockblock.
by Gaetani April 20, 2003

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Typically a female, but can be a gay male too. One whos a total prude, and refuses to do any sexual thing with a guy, "blocking his cock."
"Thats her man, shes the one that i begged and begged for the last week, and still ain't got shyt outta!"
by The walking naughty!! July 07, 2005

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