Roridomyces roridus, commonly known as the dripping bonnet or the slippery mycena, is a species of agaric fungus in the family Mycenaceae.

It is whitish or dirty yellow in color, with a broad convex cap 5–15 mm (0.2–0.6 in) in diameter.

The stipe is covered with a thick, slippery slime layer.

This species can be bioluminescent, and is one of the several causative species of foxfire.

This Agaricales-related article is a stub.