(slang) what is happening?; what's up?

(idiomatic) To be experienced or well-informed. / (idiomatic) To be astute, perceptive enough to observe a situation that is not what it seems and recognize its true nature.

(informal) Used to ask someone what alcoholic beverage they would like to drink.

What are you thinking about?

A person's personality is more important than their physical looks.

(colloquial, humorous) What's up?

(dated) Synonym of know what is what

Inquires about the subject's current occupation.

(US, colloquial, often preceded by hey) Used to express surprise or dissatisfaction with an action or statement of another person, especially to that person.

Events that have already taken place cannot be changed and actions that have already been committed cannot be undone, so it is best not to dwell on them.