Top Definition
Partly drunken beers left on tables overnight after parties. Preferably in plastic cups. Or left out for several days or even weeks or months. Possibly with cigarette butts in them. Possibly growing things too. Turning green or red.

Also the smell of old beers. Possibly also including the leftover smell on humans that persists even after they have showered.
The fraternity basement was disgusting. It is already Wednesday and there are still mung beers everywhere.

No matter how long I am away I can still remember the smell of mung beer.

You smell like mung.
by Tommie T June 28, 2009

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