What is the meaning of idiom you than

The phrase "you than" is not an idiom. It is grammatically incorrect and doesn't have a specific meaning. It likely arises from a misunderstanding or a typo.

Here are some possibilities:

* Typo: Perhaps the intended phrase was "you then" or "than you."

* Misunderstanding: Maybe the person was trying to say something else entirely and the phrase "you than" was a miscommunication.

If you encountered this phrase in a conversation, it's best to clarify what the person meant.