Green’s Dictionary of Slang

(US Southern campus) a derog. term for a black student; by ext., an unpopular person.

1973		Eble Campus Sl. Mar. 32: groid – a derogatory term for a black.
1975		G. Underwood ‘Razorback Sl.’ in AS L:1/2 60: groidn Negroid, black (derogatory white use).
1979		Eble Campus Sl. Mar. 4: groid – an unattractive, unlikeable person.