more idioms involving “hand”

Hand over fist

Very quickly

“The company had an exclusive contract for 10 years so they made money hand over fist.”

Note: This phrase is only used to describe making or losing money quickly.

The right hand doesn't know what the left hand is doing.

The actions of a group or organization are contradictory due to poor communication.

“One crew finished the road on Tuesday but another crew dug it up on Wednesday. Does the Highway Department's right hand know what the left hand is doing?”

Hold someone's hand

To give support to someone in a difficult or new situation

“Your supervisor will be there to hold your hand until your training period is completed.”

Know something like the back of your hand

To have very thorough knowledge of something

“Ask Sekine-san for advice on your holiday in Italy; she lived there for 15 years and knows it like the back of her hand.”

Have the upper hand

To have more power, to be able to control things

“Our marketing manager always has the upper hand in arguments among team members because her father owns the company.”