The process of prefixing everything with "Mc" to make it more popular.
E.g., McRib, McNuggets, McChicken....
Also, MC Hammer was a way better rapper before he changed it to just "Hammer."
"Instead of getting a sandwich made of ground up pig sphincters pressed into a rectagular pattie shape and slathered in rancid ketchup for lunch, why don't get get some McRibs instead?"
"I'm McLovin' It!"