bathfumes
The reek that emits from a restroom, most commonly those of the smaller variety, after someone has massively shat-typically in the style of a toxic dump, porridge shit, or due to mexican food. This is the type of shit where even the creator can truthfully say it smells bad.
"Jesus Kevin, would you turn the goddamn fan on?! I can smell your stanky taco-ass bathfumes from across the street!"