Soft, mushy, or squishy texture
Wrinkled, shriveled, or deeply dimpled skin
Brown, black, or moldy spots
Slimy or sticky surface
Strong sour, rotten, or off smell
Hollow or spongy feel when pressed
Stem or cap that is moldy, dried out, or darkened
Flesh that is brown, gray, or heavily discolored inside
Excessive seeds with a bitter or off taste
Visible leakage or oozing
Eggplant that feels unusually light and dried out