lamb's tail

You go tell Miss Stuart that her automobile will be here in two shakes of a lambs tail.

Slowly now, all; and in three shakes of a lambs tail we ought to be there.

All this happened in what Billie afterwards described as three shakes of a lambs tail.

If youd made a slip theyd have brushed you and Wirt aside and had a touchdown in the shake of a lambs tail.

Bert did not know just how long it took to jerk a lambs tail twice, even if a lamb had been there.