What does "gammon" mean?

Additional senses

1. 2.An imposition or hoax; humbug. [Colloq.]
2. 3.To beat in the game of backgammon, before an antagonist has been able to get his "men" or counters home and withdraw any of them from the board; as, to gammon a person.
3. 4.To impose on; to hoax; to cajole. [Colloq.] Hood.
4. 5.To fasten (a bowsprit) to the stem of a vessel by lashings of rope or chain, or by a band of iron. Totten.