"Have a nice one!"
The first time I heard that I was taken somewhat by surprise and didn't quite know how to reply. After a moment, I said, "You, too." And that seemed to work.
The longer I was in Portland, the more I heard it--from baristas, from people at the supermarket, from just about everyone.
Years ago, people used to say, "Have a nice day!" or "Have a great weekend!" Now, they just say, "Have a nice one." I guess it's easier and more convenient because it can be used at any time and on any occasion.
So, . . .
Have a great one, everybody!
