Slime/slaɪm/ Definition 1 of 4Pro Tip 1/3Negative Imagery The word 'slime' often evokes images of disgust or decay in storytelling and description. The old sink was clogged, oozing with brown slime. Pro Tip 2/3Not Always Green Although slime is frequently depicted as green, it can be any color in reality. The barrel leaked a dark, oily slime. Pro Tip 3/3Associated with Creatures 'Slime' is often used to describe substances related to animals, like snails or fish. Slippery slime coated the fish's scales.