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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.
by PR Gal 60010 February 17, 2009

Words related to Furnace Ass

bathroom beer discomfort food joke men spicy
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.
by EvilRedhead October 09, 2014