Green’s Dictionary of Slang

(US) a black eye.

1931		Irwin Amer. Tramp and Und. Sl. 88: Goog. — A black eye.
1934		G. & S. Lorimer Stag Line 164: We don’t want any googs handed out around here.
1943		Baker ‘Influence of American Sl. on Australia’ in AS XVIII:4 255: A goog denotes a black eye in America; here it denotes an egg.