In the gay male subculture, this refers to anal intercourse where there has been a deposit of semen into the rectum of the partner(s) and the depositor continues to thrust in-and-out of said rectums. Copulatory movements like the primal reflex of pelvic thrusting is the prime action causing the situation. After ejaculation in to whatever receptacle, the male of most vertebrate species stops penetrative motions (if the species needs it) and returns to nominal. However, when semen is deposited into an environment not intended to receive and chemically balance it (like a rectum), the result of this prolonged thrusting is an aeration of the proteinaceous materials abundant in human semen, the majority of it volume being water and it's pH being comparatively basic, this leads to easy spoilage. Thus the resulting product is does not remain the opalescent milky water mixture, but rather is changed into a frothy, opaquely white material. This is where the terminology originated when used in the aforementioned context: gay males often prolong their gyrations to assist their partner in achieving climax whilst together.

For that matter, it can of course happen in male-on-female intercourse with the female's rectum being the receptacle, but the association is not widely maintained.
"Mark didn't come as easily when he was with Rick last night. So, RIck wound up churning the man butter."
by Common_Sociologist February 6, 2017
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a serious warning sign one had better get near a toilet!!
some unpleasant foreign materials are planning on visiting, moving rapidly; with EXTREME VIGOR!! -i.e: EXPLOSIVE DIARRHEA, the 'SHITS', etc.
thats' all well and good, mom; but... -(mom:) where you going, sam?? MY GUTS ARE CHURNING!
by michael foolsley May 10, 2011
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Pour hot butter all over a dildo, then turn out all the electricity, sneak into a girls room and plunge the dildo in and out of a girls vagina like you are churning butter.
After drinking all night i went home, hit the circuit breaker, sprayed down King Dong with I Can't Believe It's Not Butter and gave her a good Amish Butter Churn.
by John Byrnes November 16, 2007
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When you cum on a girl's tits whilst she is lactating into a butter churn. You then proceed to churn the breast milk into butter with your dick.
I hear you and your wife just had a kid. Have you tried to churn titty butter yet?
by tiddybutter March 20, 2018
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the three phases of sex!

(1) YEARNING- absorbing knowledge of a human from whatever means, physical plane; e.t.c., and being tortured by visions of the sexual potential exuded by same.

(2) CHURNING- passing all testing, negotiation/s and processing, being given the 'green light'; and actually up and in someone's 'prime parts', in gear and actuating, grinding each other to oblivion!

(3) BURNING- the first indication control systems, now on auto-pilot are beginning to fail, and navigation is becoming clouded with sun-spots! a clue that the wax is about to burn off ones' wings, not unlike Icarus and Daedalus. the collection of all final mental samples of trans-fluidity before zooming into the center of the sun!
yearn churn burn had me held hostage at an early age

DNA commands one to yearn churn burn

yearn churn burn gave him a break after the lobotomy!

the teen was stuck yearning of churning and burning in hell
by michael foolsley August 18, 2010
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The sexual act of rubbing butter in a female partner's genitals (preferably one of your cousins or sisters), having her urinate it back into your mouth, then regurgitating it back into her anus and using it as anal lubricant
"Hey dude last night I did an Alabama butter churn with my sis"
"This is why we don't talk anymore you sick fuck"
by NotNath April 15, 2021
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While doing a girl in the ass without the benefit of an enema, you discover she has recently eaten some nuts which are now harshly scraping your dick raw as you fuck.
I was totally rushed so I slammed right into her ass... then I realized I was churning chunky peanut butter. That shit was painful but I just couldn't stop, dude!
by Antichristian6669 January 28, 2012
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