Here is a list of idiomatic expressions about the head and the mind.

Be able to (do something) standing on one’s head

When you are able to do something standing on your head, you are able to do it quickly and easily.

Absent-minded

An absent-minded person is a forgetful person.

• My mother is very absent-minded. She often forgets to lock the door when she goes out.

All in (one’s) mind

This expression is used to refer to something that does not actually exist.

• The problem between Janet and her boyfriend is all in their mind. It just doesn’t exist.

Bang your head against a brick wall.

To bang your head against a brick wall is to waste your time trying to do something although there is little chance of success.

• You are banging your head against a brick wall trying to solve that puzzle.

Bear (someone or something) in mind

To bear something in mind is to think about it.

• Please bear the dates in mind.

Beat your brains out

To beat your brains out is to exhaust yourself by thinking too much.

• I have been beating my brains out trying to figure out where I put my keys.

Beat something into someone’s head

To beat something into someone’s head is to learn it by repeating it over and over.

• I had a tough time beating the formula into my son’s head.

Bite someone’s head off

To bite someone’s head off is to speak to them in a very angry way.

• When I tried to explain things to my boss, he bit my head off.

Blow someone’s mind

To blow someone’s mind is to excite them or to overwhelm them.

• The article about the possibilities of cloning blew my mind.