show a leg

an arm and a leg

Usually used after the verb cost, but also often charge, pay, and spend: a very high price for an item or service; an exorbitant price

break a leg

Good luck!; Do your best!; Said to someone wishing they perform well in a theatrical production or comparable endeavor.

dog and pony show

Any presentation or display that is overly contrived or intricate, while lacking real substance.

get a leg up

To get a boost or a lift.

get the show on the road

To begin or launch; to get going.

hang a leg

To hesitate; to hang back.

have something to show for something

To have (some profit, reward, benefit, etc.) as a result of (one's work, expenditure, etc.)

horror show

A horrifying, appalling, or sickening experience, set of events, or visual spectacle.