The build up of various bodily fluids including and not limited to urine, semen, sweat, saliva and fecal matter that accumulates on and around the base of the commode, mostly found in dank public restrooms and glory holes. The "matter " resembles a dark pastey material with specific odor. This matter is considered an aphrodisiac by a select few.
I caught that sick bastard Mahlon on his hands and knees sniffing the Mung around the commode in the men's room up on the fifth floor..
by Uscored October 30, 2012

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The accumulation of grease, hand lotion, dead skin, hair, Diet Coke, and food crumbs that accumulates on the rollers inside a computer mouse.
I had to go into Sherry's office about every four or five weeks and scrape the mung off the rollers in her mouse, when elsewhere in the department, this practice was necessary maybe once every eight or ten months (and most people were clever enough to figure out how to do it themselves).
by Spacklepants November 16, 2006

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Any vile or disgusting substance. Named after the actual definition which is the fluids that come out of a recently dead woman usually a nice cocktail of embalming fluid and leftover bodily fluids. Elderly women over 60 are preferred for this but beggars can't be choosers.

To get it you must go to a cemetery with very liberal security and a buddy you trust enough to commit breaking and entering with. You will also need said buddy to help you dig up the grave. Once you've hit pay dirt and found the corpse you put your lips around the vagina of the dead woman and have your buddy jump off a tombstone and onto the corpse's stomach and wait for the mung to splash up into your mouth.
Ewww Jessica just stepped in mung while wearing flip-flops.
by DennisIsEvil October 20, 2006

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I heard trumpet players in the band refer to this as what remains in the horn after the spit valve has been emptied, i.e. a thin coating of hardened or coagulated saliva that builds up. Could also apply to other brass instruments and woodwinds.
You're getting out of tune. That thing must be filled with mung. You'd better wash it out.
by tralbry October 04, 2011

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Jamaican origin- A throat and/or sinus condition caused by a reaction to air conditioning.
Auntie Ruby troat so full a de mung she now vexed wit de airplane driver fe mekkin she sick.
by KiNgStOn GaL April 09, 2008

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To 'hoe into something', e.g. A tuna can, with complete disregard for what is right and wrong. If you mung down a tuna can, basic accompanying sustenance such as bread is no required.
Where's the bread? 'Just mung it down.'
by Peteypop69 October 13, 2015

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Its the greasy, hairy stuff you find in dark unseen places.
Mung is like to goo in between keys on a 10 year old college keyboard. Like the goo you find in unwashed cups holders in vehicles. Like the crap you find between table leafs when you go to put in the extra leaf. the stuff buried at the bottom of the bristles of an uncleaned hair brush...or tooth (yukky) brush. Like the gunk you find in the creases of your arm pits that you failed to wash for a week. I sure you can think of many more.
by SenorPopeye June 10, 2009

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