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To talk shit. Usually without warning (as with a laxative, except for your mouth).
Dumbass: "Yo fuck you, I ain't scared of you, or your boys or nobody, you're a little bitch and I fucked your girl!"

You: "Whoa buddy, I just whupped your father's ass with both hands behind my back and your mom's giving me sexy eyes. Why you laxatalkin'?"
by Henley Road October 16, 2009