| Idiom | Meaning | Example | 
| high and mighty | 
better than other people, snobbish, upper crust
 | 
After she married the judge, she acted kind of high and mighty.
 | 
| high five | 
celebrating by slapping each other's raised hand
 | 
After scoring a goal, the players exchanged high fives.
 | 
| high handed | 
superior, above other people
 | 
We don't like managers who are high handed - high and mighty.
 | 
| high-hat | 
proud, snobbish, pompous
 | 
Cynthia looks high-hat, but she's really very friendly.
 | 
| high hopes | 
expecting the best, hoping for success
 | 
Todd has high hopes for his son, including a college education.
 | 
| high on the hog | 
having expensive things, in luxury
 | 
If I win the lotto, we'll live high on the hog - in a mansion!
 | 
| high roller | 
a person who spends a lot on gambling and betting
 | 
This is a game for high rollers. You need a hundred grand to play.
 | 
| high strung | 
nervous and sensitive, easily upset
 | 
Jacqueline won't speak in public because she's very high strung.
 | 
| high time | 
late, past due, about time
 | 
It's high time you got a job, Ty. What kind of work do you like?
 | 
| highball it | 
drive fast, boot it
 | 
The big truck was highballin' it, speeding down the freeway.
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