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!