A person whom which eats human (and sometimes animal) poo, then while swallowing tries to talk but ends up regurgitating the poo spitting it out of her mouth.
this is the real definition of shit-talker. Do not believe the other bogus definitions.
Bob: Hey did you see Sarah shit-talking last night?
Joe: Yeah that shit was crazy man, the poo was flying everywhere!
Bob: I was pretty amused; she's a great shit talker.
apparently a band kid that no matter true or false, must in every sentence talk shit about someone else because they don't have anything to bring to the table themselves. A particular tenor drummer is very good at this stupid behavior...
You know that girl...she has a dog and she walks it...ohhhhhhh...
You know that guy...he passed his classes, what a fag...ohhhhhhh...I'm a shit talker...