DR slang in fine form...
This is some real Dominican slang. I have not heard this word/ expression used by other Latinos not even Puerto Ricans. There is a lot of slang cross over between the two nations but not this word as far as I know.
Anyway to break it down:
reb?- has several meanings one them being 'a fight' (big and out of control)
rebusero- is one who always starts one of these types of fights that leads to total disorder.
Dominicana On Line
A more common (local) and equivalent word in Spanish in various countries would simply be
'trifulca'.
Definition :
trifulca s. f. fam. Discusi?n o pelea entre dos o m?s personas, generalmente con mucho ruido y alboroto.
trifulca - significado de trifulca diccionario
-MP.