: Often used in the phrase "there's no such thing as a free lunch," meaning you can't get something for nothing. Can I Buy You Lunch? - GeoffMcDonald.com

A manager might offer this to get to know your career goals or provide informal mentoring.

In corporate or social settings, it is a low-pressure way to build rapport.

It’s often seen as less formal and less intimidating than a night out, though it can still signal romantic intent. 4. Idiomatic Cousins