pull the other 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.

get a leg up

To get a boost or a lift.

gravity's pull

Stress or pressure of a situation acting upon a person.

hang a leg

To hesitate; to hang back.

make a leg

To make a deep bow with the right leg drawn back.

not have a leg to stand on

To lack support, as in an argument, debate, or negotiation.

pull a face

To make an abnormal facial expression, either intentionally or because of an emotion.