When someone eats your asshole right after you fart.
While making love, Carl ripped a mean fart and Becky proceeded to service the furnace.
9๐ 2๐
A combination of a Cleveland steamer and a Dutch oven. You shit on your lovers chest and immediately trap the warmth and scent in by holding the covers over them.
I hooked up with this chick last night and she freaked out when I gave her a steam 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.
3๐ 1๐
When you have sex with your lady right before she has to drop a huge deuce, causing her lady bits to feel tighter.
I have to take a huge poo, so it might be a good time to do a Cumberland Furnace. The booty is full of logs.
6๐ 1๐
A heated, sticky, humid, jungle like environment which often induces swamp ass and usually conveys a smell of dirty, wet, taint juice.
This dorm bathroom is a complete crotch furnace.
That bathroom was such a crotch furnace that I had to remove my shirt while shitting.
6๐ 1๐
A self inflicted Dutch Oven. Farting under your covers and pulling them over your own head to enjoy your gastro aroma!
Dude, I love smelling my own ass so much I am a frequent occupant of the German Furnace.
12๐ 4๐