(interrogative, dialect, African-American Vernacular) whose

what or which person or people, to ask about, talking about

(colloquial) Who says so; on whose authority?

Used by a phone-call receiver to ask the identity of the caller.

Asks the interlocutor for their identification

A sentry's challenge to an intruder.

(defensively) Used to ask a stranger asking a question to identify themselves

Expressing surprise, or ironic lack of surprise, upon learning something.

(politics) Who will defeat or dominate whom? A Bolshevist principle or slogan, urging action against the capitalists.

According to whose authority (especially in defiance) / Nobody knows; it is difficult to judge