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 6, 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 25, 2007
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Monkey Scrotum when your scrotum is the same as a monkeys
OMG get your ms out of my mouth
by LuminousWedgie March 8, 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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