Here's a breakdown:
* Tu: You (informal, singular)
* No: Not
* Estas: Are (present tense of "estar", which is used for temporary states)
* Hablando: Talking (gerund of "hablar")
This phrase is a direct statement, implying that the person addressed is not speaking. It could be used in a variety of contexts, such as:
* To express surprise: "You're not talking? What's wrong?"
* To urge someone to speak: "Come on, you're not talking! Tell me what happened."
* To point out someone's silence: "You're not talking, so I'm going to assume you agree."
It's important to note that the tone and context would determine the exact meaning.