Acronym for Metal Gear Solid. A popular game by Hideo Kojima.
Dude i just bought MGS 3: Snake Eater today. Holy shit that games awesome.
by The Puppet Master January 16, 2006
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the best grammar school in kent
full of toffs and posh people
can also be used as a term for a posh boy.
'dude,tht guy is such a mgs'
by jake eaton March 14, 2008
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Married Guy Syndrome. When a married guy gets so used to the basics (eg. cooking, cleaning, picking up after themselves, etc.) being done by their wives that they forget how to do these things on their own. This happens more frequently when the male in question is a mama's boy that lived at home until marriage.
"Jim crashed at my place the other night and left food and shit everywhere. He's got a bad case of M.G.S."
by roval11 May 15, 2016
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Tom: When Bob comes we can find out how many guys Jenny has done.
Rob: MGS!!!
by WTFJIM? May 14, 2011
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Acronym meaning Magical Green Stuff*, referring to marijuana.

*Created by a group of students from BCC.
Person 1: yo, you got some mgs on you?
Person 2: you know it!

Person 1: Aight... well, what are we waiting for? Let's go smoke up!
by axel-tango-moonlight March 17, 2010
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