Green’s Dictionary of Slang

(US black) to confront.

[1818		Commercial Advertiser (N.Y.) 13 Jan. 2/2: They are informed that a School for teaching the science of Boxing is advertised in one of the morning papers of this day: -- Boxing and Squobbing].
2000		P. Beatty Tuff 14: You lucky I ain’t out there. We could bump shoulders and squab. Wax that ass, nigger.
2015		P. Beatty Sellout (2016) 233: Paying homage to the rumbles of old by ‘squabbing,’ throwing blows from the shoulder, as they act out and relive the gang fights that changed history.