What

"What" is what you say when someone's been speaking to you but you've been totally ignoring them until they say your name. Approx. 99% of the time this linguistic tool is used the user is Kate.

"So I was thinking that maybe we could do the Upper Kara or Arcway key. Your thoughts Kate?"
"WHAT"

– Atena and Kate, upon discussing where to go for Mythic+ Keys.

Typically sounds like: Skeletor says wat.