colloquially, it's like say.
"Oh, Chris." or "Chris, you..."
Can't really do a literal translation (although I'm sure someone here probably will). could be used whe someone:
-says something rather distasteful
-does something bad, but doesn't really deserve a scolding
-makes a cheesy joke
Of course you could add tone and scold someone w/ it, but I think you get the idea.