Someone is complimenting your intelligence.
The idiom "to brain someone" is thought to have originated from the idea of using one's brain as a weapon to strike or hurt someone. It is a figurative expression that means to hit or strike someone on the head with great force.
The idiom "a hot head" refers to someone who is easily angered or quick to become upset or frustrated. It implies that the person has a tendency to react emotionally or impulsively in challenging situations.
It means someone is very anxious or nervous about something. They could be doing an exam or an interview for example, and be feeling nervous about it. So they are a bundle of nerves.
Happy accident isn't an idiom since the words do not mean something figurative. They are literal. It more than likely came from the definition of serendipitous. It is an accident that makes you happy.
"Out of your mind" is an idiom. It makes no sense unless you already know that it means you are behaving in a crazy manner.
to want to do something; a wanting to entertain oneself
To feed your brain means to gain more knowledge. A related idiom is food for thought, and that is something to consider or ponder. "You should go to the library and feed your brain."
It means to be intelligent. The brain is between the ears.
It means, well like insane; cuckoo; or in other words, your brain is out of order.It means he is nuts, he is crazy, he is not normal
It's not really an idiom. It means "what are you thinking about."
RFP is not an idiom. It's an abbreviation.
It is not an idiom, it means your nose is itching.
If you have a good head on your shoulders, think what that could mean. Your head is where your brain is. If you have a good brain, you must be able to think pretty well. So having a good head on your shoulders means you're a good thinker.
It's not an idiom. It means the tip of your nostril.
idiom means expression like a page in a book
"Sieve" is not an idiom. See the related link.
This is not an idiom. It is a measurement. $100,000 is how you write it in numbers.