says you
Meaning
says you
a statement of disagreement or disbelief, especially when highlighting hypocrisy
Hot dogs are the best food ever! — Says you!
My car is the fastest car in this whole parking lot! — Says you. Prove it, let's race.
Examples
In America nobody says you have to keep the circumstances somebody else gives you.
Everyone says you have to be a specialist, and if you conduct Wagner you cannot conduct Mozart - this is nonsense.
The Second Amendment! It says you have the right to bear arms, or the right to arm bears, whatever the hell you want to do!
Nobody says you must laugh, but a sense of humor can help you overlook the unattractive, tolerate the unpleasant, cope with the unexpected, and smile through the day.
The late Estee Lauder says you can never wear white shoes after Labor Day. But of course, in today's world, that does not exist.
When everybody says you are drunk, go to sleep.