It's a cool way of saying " goodbye" and "have a nice day" at the same time. It's friendly, but you can also use it with people you dont really know.
Synonyms for have a good one
On this page, you will find 30 slang terms related to have a good one. Some of the top words include: what up dawg, Snoochie Boochies, holla, lates, laters, and 25 more.