A sexual move to be used on a female, named after the shitty town in Ohio. It requires the following props: a lit candle, Franklin brand batting glove, and electric blanket set to "high."

The man, preferably unshowered for at least 7 days, and woman engage in 69. At the moment of his climax (hers doesn't matter), a number of events occur: 1) he rips a juicy fart, 2) he pulls the electric blanket over her head, 3) he sticks the lit candle in her ass, 4) he puts his Franklin-clad thumb in her throbbing womanhood, and 5) enjoys the throes of his triumphant ejaculation.

Warning: for advanced level lovers only!
Ronnie:"Salty, ever given a girl the Franklin Furnace?"

Salty:"No, I'm not cool like Jason and Ronnie"
by Saltycock January 7, 2017
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Started with the crafting table meme from a GeorgeNotFound stream but furnace level is when things get wild when two people have sex to be exact
Person A: let’s take things to the next level.
Person B: what level to be exact?~
Person A: Furnace level~
by Skenix September 8, 2020
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After you fart many times while sitting on the couch, when you get up it is warm and the smell is there for a long time afterwards.
Todd watched the football game on the couch. When he left the fart furnace kept the room warm for hours.
by TigerDoc January 1, 2008
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An method of torture by which the victim is locked in a closet or covered with a heavy blanket, for a prolonged period of time, together with an individual with a known propensity for blowing farts of the loud, trumpeting variety, and who has recently consumed a considerable quantity of beans or confectionery containing petroleum jelly, such as jujubes. Persons subjected to torture in the blast furnace typically display symptoms such as trembling, nausea, and slurred speech.
Edgar needed several sessions with a professional therapist following his six-hour confinement in the Snickersburg blast furnace, for which Big Eddy "Brown Stain" Bollocks had provided the stoking.
by Hieronymus June 18, 2008
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Similar to a Dutch Oven, the Bessemer Furnace makes use of a closet instead of a bed. The fart can occur before or after the victim is shoved into the closet. The use of deception is critical here to lure the victim into the closet. Once trapped, the farter holds the door closed.
I told John I wanted to show him the closet he needed to paint, but I got him with the old Bessemer Furnace.
by #2stunna January 12, 2010
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When many dudes are crowded in a very uncomfortable space becoming very hot and stuffy.
Man 1: It was cramped in that locker room dude

Man 2: yeah, quite a dude furnace
by varthan October 1, 2007
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Sexual foreplay act executed by packing baby powder into your ass crack, then ripping a fart into the face of your partner causing a dry cloud of hot talc laden stench to send her to orgasmic climax.
Girl- "Hey Jill. Your face looks pale, are you Ok?"

Jill- "Oh God I'm GREAT! Johnny hammered me with a dusty furnace. My eyes burned for a minute, but it was incredible!"
by JB 058 December 18, 2013
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