To exhibit displeasure or disappointment; sulk.
To protrude the lips in an expression of displeasure or sulkiness.
To project or protrude.
To push out or protrude (the lips).
To utter or express with a pout.
A protrusion of the lips, especially as an expression of sullen discontent.
A fit of petulant sulkiness. Often used in the plural with the.
(pout) 