quicker than you can say Jack Robinson

Extremely quickly; almost immediately; suddenly or in a very short space of time. Once I'm finished with high school, I'll be outta this two-bit town quicker than you can say Jack Robinson! I was out fishing one day when, quicker than you can say Jack Robinson, a 20-pound trout jumped out of the water and right into my lap!

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References in periodicals archive

To make matters even worse, you have big brother (the dreaded car park attendant) who watches your every move, ever eager to slap a penalty notice on you quicker than you can say Jack Robinson.

Letter: Viewpoints - Shame of NHS parking charges

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