The action of Talking while having Shit ( poop ) in your Mouth.
Vince : BLARG , LASMOOSH!

Brian: Why are you talking with shit in your mouth?

Vince: YARGLBOOMF!

Brian: Stop Shit Talking!
by oWTHo December 7, 2010
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When someone communicates something negative (true or not) about a certain individual to other people. This action could manifest as a text message, a verbal conversation, or an Urban Dictionary Definition.
Person 1: Did you hear about John Doe? I heard slept with Jane Doe and Janet Doe all in one night!
Person 2: What a fuckboy! Should we tell everyone?
Person 3: Nah, just do some shit-talking about him on Urban Dictionary . It'll work perfectly!
Person 1: Thanks, but I'll send out a group text.
by Liberal Lady Ann June 16, 2016
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Talking on the phone while shitting, much to the displeasure of the person on the other end of the line.
Customer: Yes, I'd like to *groan* order a *sigh* large *fart* cheese pizza *labor-like sound* and a pizza *scream* with the works *sigh of relief*.

Pizza Guy: Sir, are you Shit Talking? *hangs up*
by Shootthemonkey May 29, 2010
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When people with a middle name relating to a song title talk down on other people or other schools basketball teams except their own for their own enjoyment to piss others off for no apparent reason.
hey you know that andy deuces guy? hes big at shit talk!
by vruj23 January 25, 2011
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Well come on you can't figure it out?

Saying shit and other words like it useing a lot of slang usually a combination of the two defines shit talk.
Her son has no chance of keeping the family's reputation going to public school with all that shit talk.
by Matt April 8, 2005
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Talking like a pompous, elitist asshole when you are wasted.
Shit Talk Drunk Guy: My job is the best in the world. My company cured aids and cancer and invented hepatitis.

Sober Guy: Sure.

Shit talk Drunk Guy: Fuck you!
by EggMcMuffown December 9, 2007
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A weak attempt at trying to portray coolness by being funny at another person's expense; typically attempted by trustafarians; often accompanied by the douche chills.
When a member of a fantasy football league insults another participant by saying in a pre-season email, "I am surprised
he even knows what football is," the rest of the league responds, "Now that's some weak shit-talking."
by D-Chills July 10, 2009
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