He Tried to Play Me Killa Season Cam'ron

they call me Patty Cake Patty Cake the bakers man

Based on the Patty Cake nursery rhyme, which originally states "Pattycake, Pattycake, baker’s man, Bake me a cake as fast as you can", basiclly meaning that he creates crack (cakes) faster than most, "as fast as he can".
Being notorious for cooking crack he was dubbed the baker's man from the nursery rhyme. (Patty cake patty cake, baker's man, bake me a cake as fast as you can.)