Button your lips and stop talking rubbish in standard English?

The phrase "Button your lips and stop talking rubbish" is a rather informal and rude way of telling someone to stop talking nonsense.

Here are some more polite and formal ways to say the same thing in standard English:

* "Please refrain from making such unfounded claims."

* "I'm afraid that's not accurate. Let's stick to the facts."

* "Your statement is simply not true."

* "Perhaps we could focus on more relevant points."

* "I think we're getting off track here. Let's get back to the main issue."

The best way to respond will depend on the specific context and your relationship with the person you're speaking to.