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A condition in which someone talks so much shit, that it's like they have diarrhea of the mouth. They also have a permanent smudge of diarrhea on their lip.
Jim: "Jake talks so much shit"

Mike: "Yeah he does, he has diarrhea lips, dude"

Jim: "Yeah, seems uncontrollable to me!"
by Rae$ February 24, 2014
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