On the Cosh Definition?

British, informal. : in a difficult situation They put us under the cosh for most of the game.

Where did the expression under the cosh come from?

- It's cosh, as in "weighted stick" and it means "under threat or coercion". My Cassell's Dictionary of Slang says it is a 1950s phrase, but relates it to a late 19th century American phrase "under the gun", with a similar meaning.

What kind of weapon is a cosh?

A club (also known as a cudgel, baton, bludgeon, truncheon, cosh, nightstick, or impact weapon) is among the simplest of all weapons: a short staff or stick, usually made of wood, wielded as a weapon since prehistoric times.