When someone eats your asshole right after you fart.
While making love, Carl ripped a mean fart and Becky proceeded to service the furnace.
by Ned_Baf February 19, 2019
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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.
by SteamFurnace October 4, 2020
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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.
by Freeze040506 February 9, 2009
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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.
by radioedit16 April 25, 2017
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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.
by mattyw August 29, 2004
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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.
by AD218 July 31, 2008
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