What does que le vas a de sir mean in english?

The phrase "que le vas a de sir" doesn't make grammatical sense in Spanish. It seems like there might be some typos or missing words.

To understand what you're looking for, please provide more context or the full sentence.

Here are some possibilities of what you might be trying to say:

* "Qué le vas a decir?" - This translates to "What are you going to say to him/her?"

* "Qué le vas a dar?" - This translates to "What are you going to give him/her?"

* "Qué le vas a hacer?" - This translates to "What are you going to do to him/her?"

If you can provide more information, I can help you get a more accurate translation.