leave you to it
INFORMAL
This page is about the conversational phrase leave you to it
Meaning
You can say this to someone when you're leaving, esp. if they're busy doing something.
For example
- After I'd fixed her computer, I said, "OK, then. I'll leave you to it, but let me know if it crashes again."
- "You're busy now, so we'll leave you to it. But come over later if you like."
Contributor: Matt Errey