Most men (boys?) of a certain age have entered into the realm of multiple ejaculative experiences — likely of the masturbatory variety — in a.
Urban Dictionary defines the phrase “I'm gonna cum!” as one “used during the act of sex or masturbation, usually exclusively used by men.
Thanks for your question! Cum is a slang word for the liquid that “comes” out of a guy's penis when he ejaculates. The real name for this fluid is.