When you want to know who someone is speaking of you say awho

You can also use it in a sentence when you are surprised or shocked to ask a question

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

when someone should be ignored , for you dont have what they want or their question cant be answered