When the foul stench emanating from one's gob is so potent, that it will actually cause an immediate involuntary gag reflex, burn your eyes, and make you want to pack your sinus cavity with rotting skunk carcasses just to mask the smell.
As soon as I opened the door to the lab, Fred's shit breath hit me in the face like a sac of hammers, even though he was about 80 feet away. That, my friends, is potent shit breath.
A person that can not or will not deficate in a public place. They have to go home or a familiar place to releave themselves; Excessively or affectedly prim and proper; excessively fastidious and easily disgusted. From the movie, American Pie, the Paul Finch character is called 'Shitbreak' by his friends because he can not take a shit in the school's bathroom. He goes home during the school day to use his own toilet.
A horrendous experience between two girls sharing a restroom at the bar, where one girl takes a massive dump and causes the other girl to vomit because of stench.
Two girls decide they need to use the restroom together at the bar. The first girl sits down and mid-urination decides to up the ante and take a shit. The smell is so disgusting it causes the second girl to vomit. When girl number two leans over toilet to let it fly, sight of recent monstrosity circulating in the shallow end causes a second purge.