flyblown

spoiled and covered with eggs and larvae of flies; "flyblown meat"; "a sack of maggoty apricots"

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"

especially of reputation; "a flyblown reputation"