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.
An acronym for "mildly amused smirk," instead of the, often misused "lol" because the majority of the time people use "lol" they hardly ever LITERALLY laugh out loud.