pout (v.)

"thrust out the lips, as in sullenness or displeasure," mid-14c., of uncertain origin, perhaps from Scandinavian (compare Swedish dialectal puta "to be puffed out"), or Frisian (compare East Frisian püt "bag, swelling," Low German puddig "swollen"); related via notion of "inflation" to Old English ælepute "fish with inflated parts," Modern English pout as a fish name, and Middle Dutch puyt, Flemish puut "frog," all from a hypothetical PIE imitative root *beu- suggesting "swelling" (see bull (n.2)). Also compare French bouder "to pout," also presumably imitative (and the source of boudoir). Related: Pouted; pouting.

As a noun from 1590s; "a protrusion of the lips as in pouting; a fit of sullenness or displeasure."

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Definitions of pout from WordNet
pout (n.)
a disdainful grimace;
Synonyms: moue / wry face
pout (n.)
marine eellike mostly bottom-dwelling fishes of northern seas;
Synonyms: eelpout
pout (n.)
catfish common in eastern United States;
Synonyms: horned pout / hornpout / Ameiurus Melas
pout (v.)
be in a huff and display one's displeasure;
She is pouting because she didn't get what she wanted
Synonyms: sulk / brood
pout (v.)
make a sad face and thrust out one's lower lip;
The girl pouted
Synonyms: mop / mow