A very strong odor seeping from ones ass causing watery eyes and burnt nostril hairs. Signaling that it's probably time to use the facilities before 'stank' turns into 'stain'.
"I'm not letting you in my car..."
"Why not?!"
"You just ate beef curry and Velveeta together and there's no way I'm driving 50 miles under a blanket of your brown stank. There's a bus stop across the street. "
When something stinks so bad, that you are just utterly paralyzed. When someone with diarrhea opens their booty hole and it stanks like a basket of poop stained tampons laying in a hot car for three days, then doused in vomit, and put in a blender with 47 used condoms.