pullover (adj.)youdaoicibaDictYouDict[pullover 词源字典]
1871, originally of shoes, from pull (v.) + over (adv.). As a noun, from 1875 as a kind of hat cover; 1925 as a type of sweater (short for pullover sweater, 1912), so called in reference to the method of putting it on.[pullover etymology, pullover origin, 英语词源]