To gang up on someone. More recently, it has meant to gather the members of an association to perform a certain task
Chief: The GDs are moving in on our territories and affecting buisiness. What do you want us to do?
Universal Elite: Tribe up everyone you can find. We gotta squash this before it escelates.
Universal Elite: Tribe up everyone you can find. We gotta squash this before it escelates.
by Westside Loc August 15, 2006