Short for a really cool game called Maple Story. It is a 2D side scrolling MMORPG!
MS is such a leet game man!
Dude! I'm level 80 in Maple Story now! I'll hook you up with a few icicles!
by Andy January 27, 2005
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MS is big daddy and deserves free head on the daily, loved by gabe the catt aka me
MS: yo wassup gabe
by Yeeyee man January 29, 2021
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an abbreviated form of the phrase My Sack. The term M.S. originated in small towns. Lack of energy in speaking the whole phrase being the main identifying factor for its origin.
by trachlor October 22, 2006
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Morning Stiffness. The boner you get when you wake up
"Honey Get down here for breakfast"

"Wait a couple minutes mom, i have MS!"
by CaptainCanuck July 06, 2004
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Abbreviation of the term "main stream".

Generally used to put someone down.

This put down could be directed at someone who listens to the top 40
or watches shows on a popular channel,
3 years after they originally aired on a lesser known, but better channel.
It could also be a general statement for someone who just does what is
"in", "hip" or "cool", or just because everyone else is doing it.

The opposite of what some fags would call "underground".
"Pussycat Dolls? That is so MS"

"You watch Dexter on channel 10?
Well I watched it on showcase, before it was cool.
Man, you are just so unbelievably MS!"
by Jafooli.So.Cooli October 15, 2008
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Abbreviation of the forum located at mindsupport.co.uk
A site originally created in 2002 for people suffering from Eating Disorders. The forum moved to it's current host in July, 2006.
Formerly known as RGP - Ruby's Gloomy Place
"I love all of the support I get from the members of MS."
by EmeraldClaire September 24, 2007
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Quite simply: Master Shake, One of the four main characters on the show aqua teen hunger force or ATHF.
The best example I can think of for master shake is "MS is hella tight, but damn he can't play guitar for shit!"
by pearbian April 22, 2007
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