Top Definition
A common phrase used during the act of sex or masturbation, usually exclusively used by men. It signifies appraoching orgasm and/or ejaculation. The ending "cum" is a play on the word come, and in turn derived from the common term cum.
"Oh god! I'm gonna cum!"
by thedoctor44 May 31, 2007
1 more definition
A warning given near the end of coitus, usually directed toward a female from a male
Guy having sex with girl: "I'm gonna cum!"
Girl: *Covers face or whatever else she doesn't want the splooge to get on*
by Mitch Tyler September 03, 2009

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