If you are stuck in Final Fantasy IX at the Gizamaluke Battle when defeating Gizamaluke, then throwing a Tent item at the boss will at some point display a message Snake Bitten and will silence the snake. It takes some attempts when throwing the tents at Gizamaluke and if it does not work it will just heal Gizamaluke. Make sure to try multiple times or reload if none of the tents worked.