squasho, n. — Green’s Dictionary of Slang

squasho n.

[‘the negro’s love of melons, pumpkins, squashes etc’ (Ware) but more likely quashie n.]

(US) a derog. term for a black person.

1909		J. Ware Passing Eng. of the Victorian Era.
1944		Mencken ‘Designations for Colored Folk’ in AS XIX:3 174: The DAE does not list such vulgar synonyms for Negro as [...] squasho.
1960, 1975		Wentworth & Flexner DAS.