An onomatopoeic adverb describing something slippery, slimy, or oily — the sensation of sliding or a slimy texture (used like 'ぬるっとする').
床に油が落ちてぬるっと転びそうになった。
Oil had spilled on the floor and I almost slipped with a slippery 'ぬるっと' feeling.
納豆をかき混ぜるとぬるっと糸が引く。
When you stir natto it pulls slimy strings with a ぬるっと texture.
その魚の皮はぬるっとして触りたくなかった。
The fish's skin was slimy and I didn't want to touch it.