FAQ for
8 Mile (2002)

Uncle tom is a derogatory name for a black person who assumes authority. Check out the wikipedia entry on the subject: http://en.wikipedia.org/wiki/Uncle_Tom.

In the movie, BRabbing sees Wink hanging out with the Free World and starts a fight with them. (it's the fight where Cheddar Bob shoots himself) There isn't a clear reason for the motives behind the fight but we know this:

1. Wink said during the Chin Tiki club scene that he won't hang out with the Free World anymore

2. Wink wants a piece of the profit; he knows that Papa Doc and BRabbit have potential, so he hangs around both of them hoping that he can get a piece of the profit.

This probably gave Brabbit reason to start the fight.

Eminem was dissing how gangster his opponents were.