Military Operations on Urban Terrain
Used to describe cities that the military fights in now andthe military has built many to train them in. Two are the Zussman Urban Traning Center and another is Shugart-Gordan.

when you're hungover as shit after a spending a night drunk as a skunk

For a female to get their breasts out for the person who shouts it.

Short for "I'm out." Refusal of self involvement.

To exit a room of friends inexplicably and only saying one word, "Mout".

to all the other definitions, "no your wrong but, good try."

MOUT is an acronym; Military Operations on Urban Terrain.