Sa mori tu

"Sa mori tu" is a romanian expression that means "no way", but directly translated to "will you die". It is used as an exclamation for something that is shocking and you don't believe it's true even if it actually is. It can also be accompanied by the word "coaie".

Person A: "You won't believe what happened! My friend hooked up with her hot neighbor."
Person B: "Sa mori tu, coaie!... I can't believe she would do that."