A Shitmouth is a liar, a BAD liar.
Someone who will maintain their lie was true, even when they're trumped by evidence.
"I know you cheated on me, the tramp told me herself! You're nothing but a Shitmouth!!"
"Dude you can't believe anything he says, he's always been a Shitmouth"
A person who eats shit.
Hey "shit mouth" how is your mom?
a person who has diaherrea of the mouth. someone who talks so much, you want to punch them.
A person who says foul things all the time. ie. as if shit were coming out of the person's mouth
Tell that "shit mouth" to stop saying bad things about me.
When you have shit in your mouth, from anyone/thing.
"hey, this shit tastes good!"
A name for a really cool awesome person or thing
GUY 1:Yo that guy is a shitmouth
GUY2:Ya i know right
Shit mouth is a term used to describe a person's vocabulary. This person is usually an over talker. Talks relentlessly about shit that doesn't matter. Mouth garbage, word spewage.
Rick always talks about nothing important to every one, he has cronic shit mouth.