foulbalken
(adjective) To describe a person or place or thing that has such an irritable stench, it is only natural to stop and walk away from the certain nefarious odor. Naturally occuring examples of foulbalkeness include Public Restrooms, Petting Zoos, and formerly the beaches of New Jersey back in the 80's.
John had to run away from the library after someone let out an inaudible but foulbalken fart.