FMUI (Fourth Meal Under the Influence): An intoxicated individual at night who craves and then eats Taco Bell's fourth meal. Pronounced as fa-mu-ee.
Usually occurs between the hours of 10pm and 2am when a drunk college student at a party yells FMUI (pronounced fa-mu-ee)!!! Everyone turns and rushes for taco bell.
by ARUSSPDX January 28, 2010