The Collaborative International Dictionary
On a pinch
Pinch \Pinch\, n.
A close compression, as with the ends of the fingers, or with an instrument; a nip.
As much as may be taken between the finger and thumb; any very small quantity; as, a pinch of snuff.
Pian; pang. ``Necessary's sharp pinch.''
--Shak.-
A lever having a projection at one end, acting as a fulcrum, -- used chiefly to roll heavy wheels, etc. Called also pinch bar.
At a pinch, On a pinch, in an emergency; as, he could on a pinch read a little Latin.
Wiktionary
on a pinch
adv. (archaic form of at a pinch English)
Usage examples of "on a pinch".
I went and got Katz and brought him back with me, pulling on a pinch of shirtsleeve.