The usage to be preferred in ordinary speech and writing is "Who are you, anyways?" "Whom" should be used in the nominative case only when a note of dignity or austerity is desired. For example, if a ...
*Refers to the latest 2 years of omaha.com stories. Cancel anytime. When you write a letter to someone you don’t know you write “To Whom It May Concern”, be careful, you might be doing it wrong.