Ninjette Arabia
The 5th Horseman
Since it's not a dictionary term, and you gave the VAGUEST description ever, a mere two words, I'll just make an assumption:
It's where you are dating someone, yet you both agree that sex with other people is okay, yes?
I don't mind that at all. I think anyone who can do that is very mature...
They are BOTH dictionary terms, and I figured that people were smart enough to look it up.I plugged it into two dictionary searches, and neither had the word...
I forgot about wikipedia, though. Commonly do that. Not used to it, as it's still a new thing to me...
And I guessed correctly, more or less, anyway...