Green’s Dictionary of Slang

(US) defeated, incapacitated.

1973		E. Bunker No Beast So Fierce 165: Cocksuckin’, motherfuckin’ punk bastards. We’re fuckin’ snakebit.
2003		N.Y. Daily News 9 Oct. 🌐 The Walker controversy wasn’t the only time that the Yanks felt snakebitten against a team that has been hexed for 85 years.