What does the idiom high and mighty mean?

The idiom "high and mighty" means arrogant and condescending, usually used to describe someone who acts superior to others. It implies they are acting as though they are more important or powerful than everyone else.

Here are some examples of how "high and mighty" might be used:

* "The boss is acting so high and mighty since the company got the new contract."

* "She refused to help me, acting all high and mighty like she's better than everyone else."

The idiom's origin is unclear, but it likely relates to the idea of someone being "on high" or elevated above others, giving them a sense of superiority.