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.
1896, \"aggressive, exuberant, touchy,\" American English, with -y (2) + feist \"small dog,\" earlier fice, fist (American English, 1805); short for fysting curre \"stinking cur,\" attested from 1520s, with present participle of now-obsolete Middle English fysten, fisten \"break wind\" (mid-15c.), from Proto-Germanic *fistiz \"a fart,\" said to be from PIE *pezd- (see fart), but there are difficulties. 59ce067264