squalid

adjective foul and run-down and repulsive a flyblown bar on the edge of town|a squalid overcrowded apartment in the poorest part of town|squalid living conditions|sordid shantytowns
adjective morally degraded a seedy district|the seamy side of life|sleazy characters hanging around casinos|sleazy storefronts with...dirt on the walls|the sordid details of his orgies stank under his very nostrils|the squalid atmosphere of intrigue and betrayal