Illadel is the slang name for Philadelphia, the greatest city on god's green earth. East Side Fo' Life. Contrary to popular belief Illadel has an orgin, it comes from The Roots' (native Illadelphians btw) song 'Game Theory'.
"I'm from Illadel the land where the killas dwell"
Don't mess with him... he's from Illadel he'll ambush you guerilla style.