Meaning of gee whiz

gee' whiz'

Pronunciation: [key]
— Informal. Informal.
  1. gee.

gee-whiz

Pronunciation: ( jē'hwiz', -wiz'), [key]
— adj. Informal.
  1. arousing or characterized by surprise, wonder, or triumphant achievement: a gee-whiz technology; a gee-whiz reaction to the sight of the Grand Canyon.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.