Meaning

noun an irregular fold in an otherwise even surface (as in cloth)

verb to gather something into small wrinkles or folds

verb draw together into folds or puckers

originOrigin obscure. Perhaps continuing Middle English pukkeren (“to hoard, save”, literally “to sack, stow away in a poke or bag”) with a change in meaning (compare purse (“to pucker”)). Alternatively, perhaps a direct alteration of poke (verb, or the noun meaning "a small bag"). By surface analysis, poke + -er.

Etymology from Wiktionary, CC BY-SA 3.0