1. A special game or concession crookedly operated. "The L.A. (legal adjuster) says the gaffs can run wide open here. The sheriff took his bit (bribe)." 2. Any device used in the crooked operation of a game of chance. 3. To spin, pad rolling, or similar controlling of unloaded dice, for the purpose of cheating. 4. The application of pressure, or force as in police third degree. Any lasting difficulty to be suffered, as rough treatment, a prison term, etc. 5. That element that removes chance and reasonably assures a desired outcome; the fix. 6. The catch; the trick; the twist or the angle.

- american underworld dictionary - 1950