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Phrase(s): pucker up
1. Lit. to tighten one’s lips together into a circle as if to kiss. • He puckered up and kissed her once, and then again. 2. Fig. [for something] to shrink up and get wrinkled. • The material puckered up when I washed it. • The top edge of the drapes puckered up and I don’t know how to straighten it out., Phrase(s): pucker something up
to cause something to wrinkle up, especially the edges of the mouth, as when tasting something very sour. • She puckered her lips up and pouted for a while. • She puckered up her lips when she tasted the lemon juice.
McGrawhill's American Idioms And Phrasal Verbs