Like a Bulldog chewing a wasp was something I'd heard as a description for something very different to a mother in law.....

Then there was the famous radio announcement....

Tits like coconuts, to which the reply is......

and sparrows like bacon rind.

Will of iron, ring of steel, knob of butter, a less than flattering description of the man from Krypton....

Happy as a pig in poo.

As loud as a Quaker raveup.

As mad as a bag of snakes/kipper in a privet bush/rhino on a pushbike

and the best description of a hurdy gurdy - a noise like a bottle of wasps

LTS