Acronym for Monday Night Guildford -> Big night out in Guildford, Surrey
Boy 1: MNG?
Boy 2: Fuck yes!
by Guildfordboy June 27, 2011
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A file type one would _think_ makes animated GIFs nearly obsolete, but instead doesn't have much support.
MNG barely has any support, and isn't very well known. It's a shame, really.
by Intelligence: The Anti-N00b March 21, 2005
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MNG is defined as Mayflower National Guard. They shoot cars instead of people and cover up aliens. They took my peanut butter last night without asking.
Person 1: Is that the MNG?
Me: Yep!
Person 2: Wow!!
by Duck0321 December 14, 2018
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A large, ugly pimple that develops on the ass if you haven't been washing for a while. It doesn't hunt, but will otherwise annoy until finally popped (usually with fire). If you don't continue to wash, it'll come back in six weeks.
Person 1: Dude, my ass is annoying the fuck outta me.

Person 2: I think you got an MNG on your ass. You should pop that shit and start washing your ass, you greasy motherfucker.
by Everyday Common Sense January 30, 2011
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Worst best school in switzerland. Only school where you'll find more students playing cards rather than checking their phones during the breaks. Outsiders and administration think it's an elite school (which it really isn't).
"I went to the MNG Rämibühl in Zürich."
"Oh you must be a genius!"
by Bottom-CH January 05, 2019
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