(slang) What’s going on with you? (as a greeting)

(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.

(idiomatic) What is annoying or bothering you?

Alternative form of what is your name

A male person or entity whose name one does not remember or want to mention but that is known to the person to which one is speaking.

(dated) Synonym of know what is what

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

What are you thinking about?

Inquires about the subject's current occupation.

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.