A Matt Damon is when one of your friends either does or says something stupid this is a adopted term from the film Team America World Police in the film Matt Damon can only say his name and is shown in the film as a retard. It can be used if a friend doesnt understand a joke, says something very stupid, does something very stupid or if he is generally not very clever
I can't believe you did that' my other friend 'what did he do' 'he pulled a matt damon
by MonsterRave August 15, 2010
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abhorrent, abominable, animal, creepy, cruddy, disagreeable, disgusting, distasteful, dog, dorky, earth pig, forbidding, foul, funky, grody, gross, hateful, hideous, horrid, loathsome, nasty, nauseating, noisome, objectionable, obnoxious, odious, off-putting, pig, pugnacious, repellent, revolting, sickening, sleazeball, sleazy, spastic, stinky, ugly, undesirable, unpleasant, unsightly, vile
by T.papa May 11, 2005
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a retard or person with a handy cap, usually clumsy people and stupid ones are fit to be called this
say something stupid or that does not make sense....... "MATT DAMON"!!!!!!!!!!!!!!!!!!!!!!!!!!!!
by Norbert koronczewwski January 17, 2008
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In New Orleans-specific usage:
To not receive a position at work, in an organization, or elsewhere after initially having been promised that position.

Derives from Matt Damon being announced as the King of Bacchus for 2010. Later, once the Saints were doing well, Bacchus's spokespeople stated that the king would be Drew Brees instead.
Bob: Man, my boss told me 2 months ago that I'd be promoted to assistant manager but then he chose Kelly instead.
Mark: Haha, you totally got Matt Damon'ed.
by gaslights January 26, 2010
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Visionary yo-yo dieting in which you sometimes appear very buff to your friends, and sometimes you appear very fat.
"What's going on with Steve? He had a beer belly last week, and now he has abs."
"I don't know man, I think he's having a Matt Damon Effect"
by superawesomeguy1496 October 6, 2011
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Ugly Matt Damon - Looking similar to Matt Damon's ugly brother or cousin.
Damn Barnes, you look like an Ugly Matt Damon.
by He's a guy December 6, 2012
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