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A sexual act when a man ejaculates inside a woman's mouth then she redeposits the semen into the man's anus by blowing it inside.
Last night my girlfriend gave me a Mouthful of Marcus.
by D.v.W. September 20, 2010
A sexual act where the male ejaculates into the mouth of his partner, and then the partner blows the sperm into the rectum of the male.
Guy 1 "I want a creampie from that girl"
Guy 2 "How is that possible?"
Guy 1 "I don't know"
Guy 2 "Wait...I got it"
Guy 1 "That's one of the most horrible things I've ever heard...let's name it Mouthful of Marcus"
by PirateJesus September 22, 2010