A troublemaker or rebel who is always looking for a fight. The term describes someone who starts a rebú (a slang term for a brawl, mess, or loud commotion).
1) That young guy is a rebusero, he is always up to no good. 2) A rebusero doesn't care about the time or place when it comes to causing trouble.
A sudden fight, brawl, or chaotic mess that erupts out of nowhere, forcing everyone to either throw down or run for cover. It is the kind of situation that happens when a pickpocket is caught or bottles start flying at the local corner store (a colmado is a neighborhood grocery shop that also serves as a social hub and bar).
Damn, a pinche broke out and they split Manuel open.