You too
Something that you say after you are told to "enjoy your meal" or " have a happy birthday" or "have a nice trip". Generally it makes you sound and feel like an idiot. You usually are.
Example:
Waiter: Enjoy your meal
Me: You too... uh.... i mean..... once you decide you want to eat.... dangit
Waiter: Enjoy your meal
Me: You too... uh.... i mean..... once you decide you want to eat.... dangit