Acronym for "Metric Shit Tonne"
John: "I've been away for a week, and had an MST of work to catch up on today!"
by ChipNZ November 06, 2011
Mystery Science Theater. When people sit in front of the screen to any movie, the cheesier and more B-grade the better, and make snarky comments.

This can also be done with fanfic by inserting text every so often to point out gross errors in characterization or whatever.
Beavis and Butthead MSTed lots of music videos from their couch.

The Protectors of the Plot Continum MSTed several fics where bad authors had wreaked havoc on canon.
by Oinge April 19, 2005
based off of Mystery Science Theater, MST is a genre of fanfiction wherein the authors of the MST take a piece from another author and taunt it mercilessly
> Jill raised a foot to enter the
> chopper, but was pushed back by the
> soldier.

ARL <soldier>: No shoes, no shirt, no service.
by Jon Madden July 16, 2005
To parody a la Mystery Science Theater 3000
Honestly, I'd rather sit through a John Agar film festival than another Gonterman story.
by Xyzzy February 21, 2004
Mississippi State Titty Shake. This is the dance done when MSU beats UF. It involves jumping up and down while chanting "Mississippi State....Mississippi State."
Hey Clunt, did you just see your cousin doing the MSTS?
by Cleed October 12, 2007
Short for "Mary Sue Torture" Usually used in fanfiction. A form of mockery in which an author takes another author's piece, and breaks it up. They generally mock each and every line, pointing out any and all typos and/or grammatical errors along the way.
Work being MST'd: And he carryed her back to merkenwood,
Author MST-ing: O.O I don't even know where to start on that one...
by Twitch February 11, 2004
Military Sexual Trauma
The military is too afraid of dealing with MST charges that they are kicking out all the women that report being raped.
by TAN22 April 17, 2009
Known among railroad nerds, this computer game was released in 2001 and officially called Microsoft Train Simulator. Now it is overused and still very slow on many computers.
Railroad nerd: Hey man, did you get the new update for MSTS?

Friend: No, I can't get it to run on my computer.
by Traindriver June 06, 2009

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