East Coast slang for a douche bag, idiot, retard, or moron.
Pronounced by East Coast Dudes- Moo- ul- lee
Pronounced logically by other Dudes- Muh- lee
Austin- Michael, you don't know how to drop an engine into a car do you?
Michael- I do too, you mully.
Lucas- What the fuck is a mully? Is that some gay east coast slang or something?