That you're about to have an epileptic seizure, and someone's coming over to put a stick in your mouth...
Two shakes of a lamb's tail.
Lambs are super hyper and their tails wag a mile a minute so presumably "two shakes" means REALLY fast.
Two shakes of a lamb's tail....oh Pulp Fiction, how I heart thee!<br />
It means quickly.
SHUSH! OR IT GOES BACK UP!
The entire ex<x>pression goes, "Two shakes of a lamb's tail." So, it means pretty quick.
It's short for an old phrase: I'll be there in two shakes of a lamb's tail. (or two shakes of a monkey's tail). In other words, quickly.
No, but it doesn't take long for a lamb to shake its tail twice.