whiff (n.)

"curl or lock of hair over the forehead," by 1890, originally a style among soldiers, a word of unknown origin. Perhaps connected with quiff "a puff or whiff of tobacco smoke" (1831, originally Southern U.S.), which is held to be a variant of whiff (n.).

"flicker or flutter as if blown by the wind," 1660s; see whiff. The noun meaning "something light or insignificant" (1670s) is preserved in whiffle-ball (1931).

hollow, perforated plastic ball, registered trademark name (The Wiffle Ball Inc., Shelton, Connecticut, U.S.), claiming use from 1954. According to the company, designed in 1953 by David N. Mullany "in response to a lack of field space and numerous broken windows by his baseball-playing son," the name based on whiff (q.v.), baseball slang for a missed swing.