noun
slippery jack mushroom
A common edible mushroom, Suillus luteus, known for its slimy cap. Often found in pine forests.
秋になると、松林でヌメリイグチがたくさん採れる。
In autumn, you can pick lots of slippery jack mushrooms in the pine forest.
ヌメリイグチはぬめりがあるので、調理するときは皮をむくといい。
Since slippery jacks are slimy, it's good to peel the skin when cooking them.
The name likely derives from 滑り (numeri, 'sliminess') and 猪口 (iguchi, a type of mushroom), referring to its slippery cap.