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When you have a threesome with two chicks that are related, preferably cousins, hence the name. Any bros that happen to be around after a Demarcus Cousins is completed, are obligated to bow down.
Dude, I Demarcus Cousins 'ed the shit out of those chicks at the wedding reception last night.

Who knew those sisters would make for the greatest Deamrcus Cousins of my life!
by Eli.G July 07, 2012
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Guy 1: "did you hear about the Demarcus Cousins that the pelicans just got"
Guy 2: "what a great deal! The potential for this beating is ray rice level"
by n8bergeron March 15, 2017
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The most loyal NBA player of all time, who never took the easy way out, and always respected his teammates.
by Yeeet77 July 07, 2018
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