Andrew and Joy tried to explain her to me, but I've managed to forget everything about her (including her name) except for two things: the way she looks, and one of her pet peeves. "She has this thing," Andrew said with a laugh, "about butt-warmth. It just grosses her out."

Butt-warmth? What in the world? I assumed it was one of those terms that, while thoroughly confusing on first listen, made perfect and complete sense once it had been explained.

I was right: 'butt-warmth' is the perfect word to describe what her pet peeve was. If forced to define, it would be something like this:

butt-warmth, (noun): The noticeable rise in ambient temperature left behind after a person sits in a chair for a period of time, and then leaves the chair vacant for the next person.