Have a good one!

This phrase means can mean "Have a good weekend!", "Have a good day!", etc. You can even use it when you don't know when you'll see someone again:

A: It was great meeting you. Take care.

B: OK, you too. Have a good one!

"Have a good one" sounds relaxed but polite. You can use it to say "goodbye" to someone who you don't know very well or have just met.

This phrase appears in these lessons: