Stink Mouth
A person who talks so much shit so often that it can be said that their mouth smells like shit. Hence the term, Stink Mouth.
That guy is such a one upper, always trying to have something bigger and better to say about everything, he's such a stink mouth.
stink mouth reeker
A term used to describe a small cat or dog
Aw, look at the little doogie! what a stink mouth reeker!