when (one) was a twinkle in (one's) daddy's eye(redirected from when was a mere twinkle in daddy's eye)
when (one) was a twinkle in (one's) daddy's eye
At or before one was born. I never knew my grandparents—they died when I was a twinkle in my daddy's eye. I was editing this newspaper when you were just a twinkle in your daddy's eye, so don't presume to lecture me on proper grammar!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.