in the twinkle of an eye
Immediately; very quickly; at once. (A variant of the more common "in the twinkling of an eye.") Just call us on this number if you have any problems, and we'll be back in the twinkle of an eye. Don't worry, boss, I'll have this report typed up in the twinkle of an eye!
twinkle in (one's) eye
1. A facial expression that denotes happiness, amusement, or knowledge of a secret. Just when Rita thought all hope was lost, Jared got a twinkle in his eye that told her he had a plan to get them both out of that sticky situation.
2. A hope or plan that is not yet in existence. You were not even a twinkle in your mother's eye when that photo was taken.
twinkle in (one's) father's eye
A phrase used to describe the time before one's birth. I never knew my grandparents; they died when I was just a twinkle in my father's eye.