After having sexual relations with a man when he cums on his partner's stomach and most of it gathers inside the partner's bellybutton.
"Jane, what's that in your bellybutton?"
"Oh phooey, that's from last night when Todd gave me a cumbutton."
"Oh phooey, that's from last night when Todd gave me a cumbutton."
by Evan Vanderhoff November 11, 2016
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The process by which, through the ingestion of an unruly quantity of phosphorous, one's ejaculate spontaneously erupts into flames upon expulsion from the penis causing widespread fear and panic.
Dave and Marie were dating until Dave's spontaneous cumbustion all over Marie resulting in a sudden case of the funerals.
by Diction.net February 24, 2015
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Get the cumbuttable mug.Cumbutt is the sticky side effect of the male penis being removed rapidly post ejaculation. If the penis is promptly removed after male ejaculation, and is unprotected, semen will naturally run down from the vagina towards the anus;thus causing so called "Cumbutt".
Male and female in missionary position. Impatient male pulls out, and after ejaculation has his freshly ejaculated semen begin flowing into the females butt cheeks. Female responds "babe, you gave me Cumbutt"
Female-"Sweetheart my ass cheeks are sticky now!"
Male-"Ha, you got cumbutt."
Female-"Sweetheart my ass cheeks are sticky now!"
Male-"Ha, you got cumbutt."
by Wierdfeet987654321 August 12, 2011
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