Furnace Ass
The extreme discomfort/cramping/sweating associated with the overindulgence of too many hot wings (or other spicy food), too much cheap beer, or a combination of them both.
John missed football practice because his furnace ass kept him in the bathroom all afternoon.
ass furnace
When one has severe constipation then goes to taco bell and eats a fiery hot double decker taco thus resulting in the build up a steaming hot turd inside your rectal cavity.
I shouldn't of eatin that taco bell today since im constipated, now i have a steamy ass furnace and might shart my britches like a british bitch.
furnace ass
A romantic partner who gives off a lot of body heat.
Wintertime camping is easy and comfortable when you share a sleeping bag with a furnace ass.