- go down (v.)
[go down 词源字典]
- c. 1300, "droop, descend," from go (v.) + down (adv.). Meaning "decline, fail" is from 1590s. Sense of "to happen" is from 1946, American-English slang. Go down on "perform oral sex on" is from 1916.[go down etymology, go down origin, 英语词源]