The physical reaction on someone's face, and in particular the involuntary contractions of the lips that occurs when an individual becomes extremely jealous or envious when hearing about the successes of others (family, friends, rivals, enemies) - usually this facial expession precedes a petty or otherwise disparaging comment. Often accompanied by the act of "Casting shade". See also - "Flounder Mode"
1. "Did you see Victor's face when Jimmy pulled up to the house in his brand new ride. Chrome was gleaming man. Yeah Vic got dat Flounder mouth real quick when he heard it was paid fo wit cash! "
2."Ohhh did you see last night !!?? Becky stay in Flounder Mode all night when she found out that she was actually the third round draft pick for Johnny. She was talking shit all night after he pulled the whole switcheroo right after they arrived at the party for a hotter chick. Dunno why she fighting so hard to swim upstream. She know she basic"
The aftermath of going down on a woman, the mixture of saliva, vaginal discharge and pubes all around your mouth is a Muffin mouth
Dam son, you got mad muffin mouth. How long where you down there?
The process of farting in someone's mouth in a sexual manner.
Emma did a mouth toot into his mouth, it was what he needed to finish
A girl's mouth that has seen so much semen in it's day that it carries the dead souls of the billions of kids shot into it.
Andrew: Yo I just kissed Sarah
Evan: Aw hell nah bro that hoe has graveyard mouth
Andrew: Aw shit
Evan: You just made out with a whole country 💀
As opposed to deep throating, when it's not possible to achieve due to the lack of inches of a man's penis, shallow mouthing must then be performed.
I ain't doing no deep throating tonight, just shallow mouthing , cuz his dick was tiny.
One whose lips been inflated in purportion to their booty.
Those bitches in Miami have mad Booty mouth.
SHUT UP YOU SMOOTH BRAIN YOU KNOW WHAT IT MEANS
"Ur bad"
"SHUTÉ THE HELL YOUR MOUTH!"