Munchkin

noun Etymology: the Munchkins, diminutive creatures in The Wonderful Wizard of Oz (1900) by L. Frank Baum a person who is notably small and often endearing

Merriam-Webster's Collegiate Dictionary

Munchkin

/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.

Free Online Dictionary of Computing