- jerk off (v.)
[jerk off 词源字典]
- slang, "perform male masturbation," by 1896, from jerk (v.) denoting rapid pulling motion + off. Farmer & Henley also list as synonyms jerk (one's) jelly and jerk (one's) juice. The noun jerk off or jerkoff as an emphatic form of jerk (n.) is attested by 1968. As an adjective from 1957.[jerk off etymology, jerk off origin, 英语词源]