pucker
verb
°To pinch or wrinkle; to squeeze inwardly, to dimple or fold.
"1914 The conduct of the white strangers it was that caused him the greatest perturbation. He puckered his brows into a frown of deep thought. — Edgar Rice Burroughs, Tarzan of the Apes,"
noun
°A fold or wrinkle.
°A sour situation.
"1874 "What a pucker everything is in!" said Bathsheba, discontentedly when the child had gone. "Get away, Maryann, or go on with your scrubbing, or do something! You ought to be married by this time, and not here troubling me!" — Thomas Hardy, ''''"