Shortening of buzeráns, from German; compare with Czech buzerant. Comes from Bulgar (Bulgarian), which was understood to mean the Bogomils, who were believed to be devoted to the practice of sodomy. Source: http://en.wikipedia.org/wiki/Bogomilism#In_modern_and_popular_culture
buzi (plural buzik)
- (pejorative) faggot (male homosexual)
- (colloquial, slang) in compounds a person who is wildly enthusiastic about something; a freak, nut
declension of buzi
From mbuzi (“goat”).