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To figuratively destroy the toilet with a massive shit
"Dude, I'm about to tear it up in there."
"I'm not going in there for a few more minutes"
by Awesome-o 2000 December 02, 2009
It means to indulge in alcohol or sex gluttonously, depending on the direction of the conversation.
I am going to tear it up this weekend...
by BigPhil June 02, 2005
to fuck the shit out of her
Ima tear it up pussy tonight
by Preston Schreck April 20, 2008