Here's the answer:
“tu n'as pas intérêt à me poser un lapin !”
Watch a real native speaker say it:
Here's how it sounds in a textbook:
You could also say:
- tu as pas intérêt à me poser un lapin !
- t'as pas intérêt à me poser un lapin !
Fun fact: the hundreds of thousands of people learning French with Memrise get this phrase correct 84.25% of the time!