Green’s Dictionary of Slang

(US campus) a plump, homely young woman.

1967–8		Baker et al. CUSS 89: Bufferilla An ugly person, female.
1969		Current Sl. IV:1 5: Buffarilla, n. Big, ugly girl (bigger than a buffalo, uglier than a gorilla).
2000		Bandit’s Bikernet ‘Tuesday’s Barmaid’ 🌐 My fellow bikers were draped in women. Granted there was the occasional fugly buffarilla, but women none the less.