hand waving

back of one's hand

A display of disrespect or scorn.

bear a hand

To make haste; to help quickly.

big hand

Synonym of minute hand (on a clock face).

bite someone's hand off

To enthusiastically accept an offer.

bite the hand that feeds one

To cause harm to a benefactor (especially one that one is dependent on, thus with the idea that this behaviour is self-damaging).

cap in hand

In a humble and respectful manner.

cold hand

Used in reference to a player who fails to make successful shots in a game.

deal a bad hand

To assign unfavorable circumstances in life to someone.