Definition

Street slang for fighting or wanting to throw down. When someone's 'bubbin,' they're either looking for a fight or actively engaged in one—it's the verbal equivalent of rolling up your sleeves.

Example Usage

Yo, those two dudes were bubbin' outside the club last night.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=Bub&defid=17604946)