Twinkle In One's Father's Eye Meaning

Example : 1975, Terry Blake, The Fig Tree, Aim Publishing (1975), page 26:  Kimberly handed him a whisky and said: "So's that, my boy. Forty-eight-year-old Glenlivet. This was a connoisseur's drop before you were a twinkle in your father's eye."1992, Martina Cole, Dangerous Lady, Headline Publishing (2008), ISBN 9780755350704, unnumbered page:  'Don't you take the piss out of me, sonny. I was doing this job when you were just a drunken twinkle in your father's eye!'2010, Max Overton & Jim Darley, Sequestered, Sequestered Books (2010), ISBN 9780980838701, unnumbered page:  â€œThirty years ago you would not even have been a twinkle in your father's eye.”For more examples of usage of this term, see Citations:twinkle in one's father's eye.