on
Preserved but no longer current.
"to be ON," in public-house or vulgar parlance, is synonymous with getting "tight" or tipsy; "it’s St. Monday with him, I see he’s ON again," i.e., drunk as usual, or on the road to it. "I’m ON" also expresses a person’s acceptance of an offered bet. To GET ON a horse or a man is to make bets on it or him. "Try it ON," a defiant challenge to a person.
Era: ca. 1874 (Victorian)
Sources & notes
Historical definition reproduced from Hotten’s The Slang Dictionary (1874, public domain; Project Gutenberg #42108, retrieved 2026-07-31). Reflects the attitudes of its era.
Common questions
What does “on” mean?
"to be ON," in public-house or vulgar parlance, is synonymous with getting "tight" or tipsy; "it’s St. Monday with him, I see he’s ON again," i.e., drunk as usual, or on the road to it. "I’m ON" also expresses a person’s acceptance of an offered bet. To GET ON a horse or a man is to make bets on it or him. "Try it ON," a defiant challenge to a person.
Is “on” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.