feist (n.)youdaoicibaDictYouDict[feist 词源字典]
also fist, "a breaking wind, foul smell, fart," mid-15c. (Old English had present participle fisting, glossing Latin festiculatio), a general West Germanic word with cognates in Middle Dutch veest, Dutch vijst; see feisty.[feist etymology, feist origin, 英语词源]