twisty (adj.)youdaoicibaDictYouDict[twisty 词源字典]
1857, "full of windings," from twist (n.) + -y (2). Meaning "attractively feminine," 1970s slang, is from twist "girl" (1928), apparently from rhyming slang twist and twirl (1924).[twisty etymology, twisty origin, 英语词源]