The largest piece of fecal matter in a single bowel movement. Can arrive alone, or among a smaller, heralding convoy of toadies, known as Turdies.
I thought I'd finished dumping a load; little did I know the Mother Shit had yet to arrive.
by thedpster May 5, 2012
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Your reaction when shit is about to go down or hit the fan
When shit is about to go down

Sweet mother of shit
by IduckingH8U November 24, 2018
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Combination of holy shit and mother fucker: an exclamation of excitement or approval
by Nacho Grande October 31, 2007
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Something you say when you've been dealt a vast amount of ownage. It's a compulsory response to having your ass handed to you. It's usually uttered in the hopes of saving face.
Ernie: Your mother ain't shit!
by Spotted Sea Cow April 14, 2005
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