pout

Short definition from Wiktionary

Verb

1. 1
   To push out one's lips.
2. 2
   To thrust itself outward; to be prominent.
3. 3
   To be or pretend to be ill-tempered; to sulk.
4. 4
   To say while pouting.
5. 5
   To shoot poults.

Noun

1. 1
   One's facial expression when pouting.
2. 2
   A fit of sulking or sullenness.
3. 3
   Any of various fishes such as the hornpout (Ameiurus nebulosus, the brown bullhead), the pouting (Trisopterus luscus) and the eelpouts (Zoarcidae).
4. 4
   Alternative form of poult.