flyblown

adjectives

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"
is similar to
marred by imperfections