no you don't
US /noʊ ju doʊnt/
UK /noʊ ju doʊnt/

1.
used to express disagreement or disbelief, often playfully or emphatically, when someone states an intention or belief
:
•
I'm going to eat all the cookies! — No you don't!
•
I think I'll just leave early today. — No you don't, we have a meeting in five minutes.