XH and I used to refer to it as a Thing (pronounced Fing).
His, on the other hand, was a Fing.
We also used to call each other Fing.
The children, when they were small, were referred to collectively as the Fings.
We had a rather crazy dog who was referred to as the little fing.
If any of the offspring or pets had an accident on the carpet we'd say they'd done a fing.
Plus, of course, it's a useful fill-in word for anything you couldn't remember the name for at that precise moment.
This may sound quite confusing to some, but I assure you, it's all in the context. Thus, if one of us were to say "Oh Fing, the little fing has done a fing in the Fings' room", we would know instantly that we were referring to a dog poo on the floor of the children's bedroom. "Sorry Fing, I've got a fing on my fing" meant "I'm afraid sex is off the cards, I have an unexplained sore spot on my genitalia".
After all, marriage is all about communication, isn't it?