Green’s Dictionary of Slang

(US) a strange, eccentric person.

1929		W.D. Edmonds Rome Haul 188: He was a funny old bezabor.
1930		(con. 1830) J.A. Russell ‘Erie Canal Colonial Expressions’ AS VI:2 97: Bezabor: a peculiar character. ‘He’s a queer old bezabor.’.
1940		(con. 1836) Sat. Eve. Post. 10 Feb. 88/1: [a circus clown to a lion] Lay down, you big bezabor, here I come.