Quote Originally Posted by Edwina's Secretary
Once upon a time there was a choice on forms of POSSLQ. Stood for Person of the Opposite Sex Sharing Living Quarters.
My ex and I actually adopted this one--often we shortened it to "Possel" or "Q."

Charles Osgood even wrote a poem about it. Here's an excerpt:

There's nothing that I wouldn't do
If you would be my POSSLQ.
You live with me, and I with you,
And you will be my POSSLQ.
I'll be your friend and so much more;
That's what a POSSLQ is for.