Lil B is a rapper from Berkeley who has built one impressive online following. At 25 years old he has already become one of the most popular rappers in the world and has kind of snuck up on the national conscience.
I don't really know much about his rap yet, but I do know that he is most famous among non-hip hop heads for the curses he's placed on basketball players. A Warriors fan (East Bay represent!), he cursed Kevin Durant for not understanding the popularity of Lil B, and has cursed James Harden for stealing his cooking dance (Lil B will be at Game 5 of Warriors-Rockets to personally curse the Beard in person).