"You've gotta be kidding me!"

YEESH

That exasperated sound you make when someone’s joke falls flat or things go sideways.

The exclamation "You've gotta be kidding me!" is a reaction of disbelief or frustration, and "yeesh" is a casual, slangy way to express the same feeling. It’s a playful, exaggerated response—like when someone rolls their eyes or throws their hands up in mock exasperation. The clue plays on the idea that both phrases convey that "really?!" energy, just in different words. Think of it as the crossword’s way of nodding to everyday sarcastic reactions.