on
"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.