A fork of Rural Dictionary
When something tastes extremely unbeliveably good.
That grilled cheese was so good it was like a mouth gasm.
A circle mouth-gasm is like a circle-jerk but instead of jacking off, the five or six guy get their dicks sucked and have cumgasms in the mouth of a guy on his knees beating off who swallows their thick loadsof cum.
In my Fraternity X, I always looked forward to the other dudes having circle mouth-gasms in my mouth and swallowing their creamy loads!