A person with a fragile mindset and lacking the ability to deal with tough situations. Feeble.
Whenever Mitch is given constructive criticism, he turns into a total mental midget and starts freaking out thinking he is going to get fired and becomes all pissy and whiny. He can't mentally deal with pressure and folds like a cheap lawn chair.
by mflannery420 April 5, 2011
Get the mental midget mug.
A person of extremely low I.Q.. Prone to being clueless in all aspects of life.
That guy is such a mental midget, it's almost criminal that he be allowed to live.
by Ghost July 27, 2003
Get the mental midget mug.
a person who is narrow-minded or has limited knowledge or insight to anything outside his or her immediate life.

basically someone who lacks education or higher thought.
I tried to start a conversation about Hapsburg Europe with that hot looking babe at the party who is supposedly a history major.
turns out she's just another mental midget, since all she talked about was her ex boyfriend Diego and her Mary Kay cosmetics collection!
by polo June 18, 2005
Get the mental midget mug.
Brad Lidge

See MLB 2009 Regular Season
See MLB 2009 playoffs
I never should have bet the Phillies in my MLB parlay... Brad Lidge can't close games and gets so easily rattled when he puts runners on base. That guy is a mental midget. Fucking Brad Lidge....
by payday0023 November 4, 2009
Get the mental midget mug.
Your average dumbass who still uses "faggotry" and "autism" to describe things they hate. Clearly stuck in the past and narrow-minded to new ideas and concepts, even to old ones that work.
Nikolai shows his mental midget behavior as he shows off his obsession with Pokemon, giving shit to some teenager for making their own fan made designs. Clearly having a shit fit over this.
by The Painful Reality May 25, 2020
Get the mental midget mug.
A guy with an ego under 4'8".
A mental midget is not above making your life miserable.
by Solid Mantis August 31, 2018
Get the Mental midget mug.