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1.
Usless MBA, someone who has an MBA but not the real world skills and to hold down a job which utilizes thier education.
MBA who works in a job that doesn't require even a bs degree.

Dude, that Barista has an MBA
--Make that a U MBA
by dander56 January 24, 2012
 
2.
A person who has been educated beyond their experience or intelligence.
I can't believe they put Mark in charge he just started with the company and doesn't know anything about our product; the umba has no business running a project of this size!
by tgaptte April 23, 2010
 
3.
short for Unbalanced. Generally used in gaming to describe a class or abilty that is too strong and not balanced fairly with other classes or abilities
Death coil / Fear makes locks umba
by caslo February 19, 2007
 
4.
Anacronym for Universal Mobile Battery or Adapter. Refers to small compact batteries and chargers used to poewr or recharge USB powered devices.
My smart phone was out of power but I was able to borrow an UMBA from a guy on the bus.
by tchansen29 February 21, 2011