- swinger (n.)
[swinger 词源字典]
- 1540s, "one who or that which swings," agent noun from swing (v.). Also (now obsolete) "anything big or great" (1580s). Meaning "person who is sexually promiscuous" is from 1964. Old English swingere (n.) meant "one who strikes, scourger."[swinger etymology, swinger origin, 英语词源]