Toss  —v. 1 throw up (a ball etc.), esp. With the hand. 2 roll about, throw, or be thrown, restlessly or from side to side. 3 (usu. Foll. By to, away, aside, out, etc.) Throw (a thing) lightly or carelessly. 4 a throw (a coin) into the air to decide a choice etc. By the side on which it lands. B (also absol.; often foll. By for) settle a question or dispute with (a person) in this way. 5 (of a bull etc.) Throw (a person etc.) Up with the horns. 6 coat (food) with dressing etc. By shaking it. —n. 1 act of tossing (a coin, the head, etc.). 2  fall, esp. From a horse.  toss one's head throw it back esp. In anger, impatience, etc. Toss off 1 drink off at a draught. 2 dispatch (work) rapidly or without effort. 3 coarse slang masturbate. Toss up toss a coin. [origin unknown]