suckerpunch (n.)youdaoicibaDictYouDict[suckerpunch 词源字典]
also sucker-punch, 1926, from sucker in the "dupe" sense + punch (n.3). Figurative use by 1929. As a verb by 1942. Related: Sucker-punched.[suckerpunch etymology, suckerpunch origin, 英语词源]