quicker than you can say Jack Robinson

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!
See also: can, jack, quicker, Robinson, say
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.