Sour, fermented, or alcoholic smell
Mold on the skin, leaves, or cut surface
Soft, mushy, or leaking spots
Dark brown or black areas inside
Dry, shriveled, or hollow-looking flesh
Slimy texture
Off, bitter, or unpleasant taste
Leaves that are brown and dry throughout
Skin that is very wrinkled or collapsing
Juice that looks cloudy or smells bad
Visible insects or signs of rot
Cut pineapple that has been stored too long in the fridge