Mammary Alienation Syndrome. Horrible malady afflicting children that have been breastfed by a wet nurse.
Though it seemed like Terets, her child was actually suffering from M.A.S.
by bjacobs27 May 11, 2010
Top Definition
Mildly Amused Smirk. Because how many people actually LOL at the internet? Think about it.
I saw a man fall off the roof. MAS
by Frumy October 10, 2008
Spanish: more, or very
This is mas cool. - This is very cool.

Dude, mas cheese on these nachos. - More cheese on these nachos.
by DistalBraker January 07, 2005
Short for Masturbation.
ie Dude, if you dont have your laptop for porn, what are you going to Mas over?
ie Dude, if you dont have your laptop for porn, what are you going to Mas over?
by 3842Crew October 21, 2009
Acronym. Stands for Male Answer Syndrome. (Pronounced - MASS) Used to describe a male know-it-all who doesn't really know-it-all. Not necessarily a complete idiot, but someone who tends to dish out inaccurate information on a regular basis - but with complete confidence and a touch of arrogance. Usually provides this information without invitation or provocation. A Cliff Clavin if you will.
Sandy and I were discussing the new guidelines, and John -in typical MAS fashion, chimed-in with his unsolicited anecdotes.

by RouxDog June 10, 2008
M= making
a= a
s= sandwich
I bet dallas is Mas right now...
by Kylende14 May 03, 2007
Middle-Age Shred
A group of born-again skateboarders who typically skated in the late 70s / early 80s and then rediscovered their passion in their forties. A form of mid-life crisis!
John always dreamed of getting on a skateboard again and when he discovered MAS he knew he was amongst friends who would understand.
by Eyesi July 31, 2008
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