Noun

Pronounced /ko͝om,kəm ˈbətn

Another word for the prostate. The prostate can be massaged for sexual stimulation and can cause longer and harder orgasms. The button part comes from its circular shape and the fact that it can be "pressed" like a button. Often can be pressed to make a person cum/orgasm when they're sexually aroused enough already.
Jenny: I was with this guy last night and he just wouldn't cum; it was getting me angry.
Tiffany: So what'd you do?
Jenny: I pressed his cum button. You should've seen his face when I stuck it up his ass!
by Law&Hijinks April 27, 2017
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When you jerk off on your stomach, and some of your spooge gets in your belly button. It hardens into an edible button. Kind of like those candy buttons.
After your Mom blew me, I satiated her hunger with a freshly pressed cum button.
by Sweatyygrundle April 1, 2007
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When a guy cums in a girl’s belly button, and after it dries, she goes out in a crop top
“Does this scarf match my cum button?”

Jessica’s crop top really shows off that cum button”
by Nerpeg and Pegson February 26, 2023
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belly-button cum is the pool of semen that collects in a guy's belly-button after he jacks off his morning wood and paints the wall -- the last of his cumshot dribbles out of his dick and flows into his belly-button.
Oh fuck -- I took care of my morning wood, but I got cum everywhere! -- on the wall behind me, in my hair, on my face, in my mouth, on my neck, tits, stomach, and even had a pool of belly-button cum.
by USAF Cadet November 11, 2020
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