n. a small or insignificant person. : You're not going to let that munchkin push you around, are you?
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw-Hill Education.
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/muhnch'kin/ [Squeaky-voiced little people in L. Frank Baum's "The Wizard of Oz"] A teenage-or-younger micro enthusiast hacking BASIC or something else equally constricted. A term of mild derision - munchkins are annoying but some grow up to be hackers after passing through a larval stage. The term urchin is also used. See also wannabee, bitty box. [Jargon File]