The word 'flyblown' often implies a strong feeling of disgust, especially when relating to food. The restaurant lost its license due to serving flyblown leftovers.
Pro Tip 2/3
Visual Imagery
'Flyblown' can conjure up vivid mental images of food swarming with flies, heightening its unappeasable nature. The garbage can was left open, and soon the trash inside was flyblown.
Pro Tip 3/3
Not Just Literal
While 'flyblown' suggests literal contamination by flies, it can also describe any food perceived as disgustingly inedible. I couldn't touch the flyblown cheese; it had a terrible odor.