fix
/fĭks/
intransitive verb
- To correct or set right; adjust. fix a misspelling; fix the out-of-date accounts.
- To restore to proper condition or working order; repair. fix a broken machine.
- To make ready for a specific purpose, as by altering or combining elements; prepare. fixed the room for the guests; fix lunch for the kids.
Fix used in the sense you are referring to dates back to the 18th century:
- Sense of "tamper with" (a fight, a jury, etc.) is from 1790.
probably from the earlier meaning :
- "settle, assign" evolved into "adjust, arrange" (1660s), then "repair".
(Etymonline)
Ad a set phrase the earliest usage I could find is from the '40s, but earlier usages are possible:
From: Collier's, Volume 106 Crowell-Collier Publishing Company, 1940
- ... fifteen dollars on a fight in his life. "Well, here it is," the McCoy tough guy explained. "We're from New York and you're from New York and we seen you're okay. So we're out here for the fight. On business. The fix is in and the white boy wins.
Ngram: fix is in.
Answer from user66974 on Stack ExchangeVideos
Fix used in the sense you are referring to dates back to the 18th century:
- Sense of "tamper with" (a fight, a jury, etc.) is from 1790.
probably from the earlier meaning :
- "settle, assign" evolved into "adjust, arrange" (1660s), then "repair".
(Etymonline)
Ad a set phrase the earliest usage I could find is from the '40s, but earlier usages are possible:
From: Collier's, Volume 106 Crowell-Collier Publishing Company, 1940
- ... fifteen dollars on a fight in his life. "Well, here it is," the McCoy tough guy explained. "We're from New York and you're from New York and we seen you're okay. So we're out here for the fight. On business. The fix is in and the white boy wins.
Ngram: fix is in.
A variation of the expression can be found in Bernard Malamud's "The Natural," p. 203 (Farrar, Straus & Giroux, 1952), "The fix is on." The speaker is a not-especially educated man, so the variation is probably deliberate on Malamud's part.