What is the meaning of the idiom "to go bananas"?

What does it mean if someone says they are "in a pickle"?

They are in a difficult or tricky situation

What is the meaning of the idiom "to butter someone up"?

To flatter or be extra nice to someone in order to gain favor

What does the idiom "to have your cake and eat it too" mean?

To enjoy the benefits of something without sacrificing it

If someone "has a beef with someone," what are they doing?

Holding a grudge or having a complaint against someone.

What does the expression "to have a bun in the oven" mean?