What are some idioms related to emotions and feelings?

There are several idioms related to emotions and feelings. Here are a few examples:

1. "Bite the bullet" - This idiom means to face a difficult or unpleasant situation with courage and determination.
2. "Break a leg" - This idiom is often used to wish someone good luck, especially before a performance or presentation.
3. "Caught between a rock and a hard place" - This idiom describes being in a difficult situation where there are no good options or choices.
4. "Cry over spilled milk" - This idiom means to be upset or regretful about something that has already happened and cannot be changed.
5. "Feel on top of the world" - This idiom expresses a feeling of great happiness or success.
6. "Get cold feet" - This idiom refers to feeling nervous or hesitant about doing something, especially after previously being enthusiastic about it.
7. "Kick the bucket" - This idiom is a euphemism for dying or passing away.
8. "Let the cat out of the bag" - This idiom means to reveal a secret or confidential information.
9. "On cloud nine" - This idiom describes a state of extreme happiness or euphoria.
10. "Take it with a grain of salt" - This idiom suggests not completely believing or trusting something, as it may not be entirely accurate or reliable.

These idioms are commonly used in English to express various emotions and feelings in a figurative way.