Green’s Dictionary of Slang

chabobs n.

[? ker- pfx + boob n.3 (1) n.; note chorb n.]

(US) the female breasts.

[US]K. Kesey One Flew Over the Cuckoo’s Nest (2002) 158: McMurphy starts. ‘She’s got one hell of a set of chabobs,’ is all he can think of.