Knockout
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 23:19的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/knockout ref] From knock out. == etymonline == [https://www.etymonline.com/word/knock…”的新页面）
wiktionary
From knock out.
etymonline
knockout (n.)
also knock-out, in fighting, 1887, from verbal phrase knock out "to stun by a blow for a 10-count" in boxing, short for to knock out of time; see knock (v.) + out (adv.). Slang meaning "excellent thing or person" is from 1892; specifically "beautiful woman" by 1953. As an adjective from 1896 in the tournament competition sense, 1898 in fighting. To knock oneself out "make a great effort" is from 1936.
