whiz' kid" Informal.
a youthful and exceptionally intelligent, successful, or influential person in a given field: the whiz kid of network programming.
whiz-kidPronunciation: (hwiz'kid", wiz'-), [key]
of, pertaining to, or being a whiz kid: a whiz-kid sales manager.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.