- free-for-all (n.)
[free-for-all 词源字典]
- "mass brawl" (one in which all may participate), 1918, from earlier adjective use (1868), especially in reference to open horse races, American English. Earlier as a noun in reference to free-for-all horse and motorcar races.[free-for-all etymology, free-for-all origin, 英语词源]