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1.
military slang for someone who is "short" on a tour of duty, less than 100 days away from going home, or retiring.
Tim retires in June, so in February he will be an official double digit midget. Countdown to never wearing a uniform again!! 100, 99, 98, better than Christmas!
by Sandy Tracy February 20, 2007
 
2.
In jail or prison, somebody who has 99 days or less time left.
Jeff has 3 months of time left... he's a double digit midget
by Anonymousey October 27, 2006