A person who thinks they are the shit but really they are just BIG BITCHES. Which is why it is called "Mucha" a lot and "Mitch" cause they are a bitch.
MuchaMitches also think that they are good at everything.
Greg Stanton says he is good at baseball, football, basketball, halo, getting the hottest girls, etc. But he is nothing but a pile of shit that his dad made a Notre Dame Scout come to watch him warm the bench for the benchwarmers. This is a perfect example of a MuchaMitch.