slushy (adj.)youdaoicibaDictYouDict[slushy 词源字典]
1791, "covered with slush," from slush + -y (2). As slang for "ship's cook," 1859, from slush (n.) "refuse from a cook's galley" (1756). Related: Slushiness.[slushy etymology, slushy origin, 英语词源]