screwball (n.)youdaoicibaDictYouDict[screwball 词源字典]
"eccentric person," 1933, U.S. slang, earlier as a type of erratic baseball pitch (1928), from a still earlier name for a type of delivery in cricket (1866), from screw (n.) + ball (n.1). Screwball comedy is attested from 1938, in reference to Carole Lombard.[screwball etymology, screwball origin, 英语词源]