STOCKTON — A man wielding a pocket knife absconded with a slab of meat from a business in the 700 block of West Hammer Lane about 11:20 p.m. Thursday, police reported.The man walked past all the registers in the store and, when confronted by a security guard, showed the knife and said "If you know what's good for you, don't come at me, bro," police said.There was no description of the robber or the cut of meat.