Green’s Dictionary of Slang

choff n.

[chow n.1 (1) + scoff n.; Cape Du. (and orig. European Du.) term meaning a quarter of a day, and thus one of the four meals eaten in a day]

food.

[US]Sanders Family (1972) 95: The bulk of the choff was garbage. Part of the ‘rent’ the family paid at the ranch was the preparation of food.