When cum is leaving the penis but comes out to slow and forms a bubble at the head of the penis.

Bursts of air from a poo-hole.

the event of ejaculating into a girls (or guys) mouth and they start to blow bubbles with it

An inflated mass of semen that is produced during the gargling of such fluids.

A cum-bubble is a cum-covered sphere of anal gas and smells like cumgasm that pops out of my butt-hole after my cadet roomie fucks my boy-hole.

During anal sex, a cum bubble is produced when a male ejaculates into the rectum of his partner. Since it feels like flatulence, which is essentially a bubble of gas in the rectum, it was thus named.

When a women(or man) gets cream pied and she/he farts or queefs and it creates a bubble that pops.