was du da tust

what you're doing there

→ was
phrase Rare #44,495
what you're doing there Often used when questioning or criticizing someone's actions; “da” can mean “there” or add emphasis.
GE: Weißt du, was du da tust?
EN: Do you know what you're doing there?

Findest du gut, was du da tust?

Do you think what you're doing is right?

— Gangs of Wasseypur - Teil 1 (2012)

Was glaubst du, was du da tust?

What do you think you're doing?

— Von ganzem Herzen (1998)

Was du da tust, ist unverantwortlich!

What you're doing there is irresponsible!

Weißt du eigentlich, was du da tust?

Do you even know what you're doing?

— The Man from Nowhere (2010)