The act of two people shitting in the same toilet without flushing. (intended as an insult to the bathroom owner)
Hirsch has been an asshole, let's shit stack his toilet.
by acoustic sean April 11, 2008
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When one shits on the ground, and another shits on top of the original shit. Usually very steamy and mountainous.
C-Mac: "Someone took a steamy shit on the floor!"

Tony: "That is one big shit, it looks two things did it. Some people may be Shit Stacking."
by Mustafa_Raza_ July 15, 2012
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A technique used for the digestion speedrun where one has loaded a constipation stool slug and charges it with lots of taco bell diarrhea to create an explosive charge that is really useful in combat
"this dude's a real pro at shit stacking he got a whole squad wipe when they were all trying to piss cancel."
by AntonioSwift77 March 26, 2022
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so hammered drunk that one shits in his pants or on another object/person.
John was so shit stacked he woke up with a giant loaf of crap in his pants
by dirty dick z March 24, 2009
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Short for bullshit stacking. It's a tactic bullshitters use to place a large enough stack of BS consecutively to basically exhaust the willingness of a rational person to unpack it. It's followed by the bullshitter using that lack of willingness as a "victory" for their viewpoint. It's a consequence of Brandolini's law. See Liz Wheeler and Jordan Peterson as shining examples of this tactic.
From facebook, today: "don't claim to be a spiritualist if you bash others beliefs and religions ... you may not do those things under the white light of god but i sure do, especially tarot readings. Do yall know the portals you can open up doing that?? so yes i go by god he is my protector and this is exactly why you guys need educated before speaking on things."
Me: Wow that's too much shit stacking for me to bother unpacking it.
by Lu Dogg April 13, 2021
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When you and your boys shit on each others shits without flushing.
Yo guys that party was crazy we shit stacked all the toilets and caused major flooding.
by gotar4 May 28, 2021
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Its a stack of fuck shit on top of itself.
You take some fuck then some shit then some fuck then some shit then you got a Fuck shit stack. -Reggie Watts
by AlphaTJH August 31, 2010
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