before you could say Jack Robinson
before (one) can say Jack Robinson
Very quickly or suddenly. (The true identity of Jack Robinson is unknown.) I'm not far from your house, so I'll be there before you can say Jack Robinson. Before I could say Jack Robinson, Tom had leapt to his feet and rushed out of the room.
See also: before, can, jack, Robinson, say
Farlex Dictionary of Idioms.
before you could say Jack Robinson
OLD-FASHIONEDCOMMON If you say that something happened before you could say Jack Robinson, you mean it happened very suddenly and quickly. The pair of them were out of the door and down the steps before you could say Jack Robinson. Note: People sometimes change Jack Robinson to a word or expression that relates to the subject they are talking about. She was on the phone to New York before you could say long-distance. Note: The identity of Jack Robinson is unknown and the name might have become popular because both elements were once extremely common. The phrase appears in the novel `Evelina' (1778) by Fanny Burney: `I'll do it as soon as say Jack Robinson'.
See also: before, could, jack, Robinson, say
Collins COBUILD Idioms Dictionary, 3rd ed.
- before (one) can say Jack Robinson
- before you can say Jack Robinson
- Robinson
- jill off
- jack all
- jill it
- Jack Tar
- trade
- decide between
- decide between (someone or something)