Wat betekent “wat zeg je” in het Nederlands?

Wat zeg je literally means "what are you saying" or "what did you say." Dutch speakers use it in two distinct contexts. As a literal repeat-request: wat zeg je asks the listener to say the thing again because the speaker didn't catch it. As rhetorical disbelief: wat zeg je?! expresses surprise at what was just said, the way English uses "what?" or "say what?"

The phrase is one of Dutch's everyday acoustic-recovery tools. Dutch speakers in noisy environments (cafés, crowds, kids in the background) use wat zeg je dozens of times a day to ask for repetition. The construction is short and clear, which makes it efficient in conditions where a longer "kun je dat herhalen alstublieft" would be impractical.

A pragmatic note: wat zei je (with past-tense zei) asks for repetition of something already said. Wat zeg je (present zeg) asks for repetition of something the speaker is in the middle of saying. Both work; choice depends on whether the original utterance is complete.