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"
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"
by Street poet December 27, 2019

That weird uncanny valley way that MrBeast has his mouth open in literally every thumbnail of his videos. Neither a gape of surprise nor laughing, or anything a real human would do except when …
B: Dude, why is Jerome in the hospital with a throat injury?
A: He *begged* me to deep throat my cock! He literally gave me *beast mouth*!
B: OK, in that case I get it. ^^
A: He *begged* me to deep throat my cock! He literally gave me *beast mouth*!
B: OK, in that case I get it. ^^
by Evi1M4chine August 9, 2023

by RedEd1917 January 2, 2023

by mrmrpizza June 8, 2022

by nlffumbxfh February 25, 2017

When you eat a strawberry that has come from the grocery store and don't properly rinse it before you eat it your mouth with fall off within a few days.
- this is due to the chemicals used to make sure that the strawberry stays fresh along with the chmicals used while it grows which is harmful to humans
- this is due to the chemicals used to make sure that the strawberry stays fresh along with the chmicals used while it grows which is harmful to humans
The patient here seems to be experiencing drop mouth, for eating to many strawberries without washing them.
by Don't Believe June 19, 2022

southern term for mouth for as Gatorade mouth. Parent's put that in kids bottles instead of milk causing tooth decay
by pussyfooting69 March 17, 2019
