ДШ
Дмитрий Шапилов
это вообще-то зависит от контекста, может быть и What are you talking about?, и What do you mean? (уж никак не Present Continious), и What could that mean? и некоторые другие
What are you talking about?
What are you getting at?
What do you mean?
What are you meaning?
What are you talking about?