Is it ensure, insure, or assure?
"curl or lock of hair over the forehead," 1890, originally a style among soldiers, of unknown origin. Perhaps connected with quiff "a puff or whiff of tobacco smoke" (1831, originally Southern U.S.), held to be a variant of whiff (n.).
A prostitute or promiscuous woman; roundheel: because some quiff is going to give you head
[1923+; origin obscure; probably related to the sense ''copulate,'' found by 1719]