expression, godan verb (-su)
pout; purse one's lips
Describes the action of pushing one's lips forward in a pout, often to show displeasure or sulkiness. The related expression 口を尖らせる is also common.
See also: おちょぼ口をする · 口を尖らせる (くちをとがらせる)
彼女は不満そうに口を尖らした。
She pouted her lips in dissatisfaction.
子供は叱られて口を尖らせていた。
The child was pouting after being scolded.