Silk purse, sow's ear?

A month of Sundays. The life of Riley. Happy as Larry. Cheap as chips. Keeping up with the Joneses.

Raining cats & dogs? They'd have to close the roof at Wimbledon then! Imagine the cricket: 'Erratic feline and canine activity has curtailed play'.

Pig in a poke? Never bought a pig, never mind one in a poke!

I could go on . . . a

Are these metaphors, aphorisms, sayings, mottos? What's the difference?

Which ones get over/misused? Which do you really hate? Suppose that's a kind of a game of two half's question?

Might just have 30 winks . . .