golden mushroom
Also known as the Golden Dash Mushroom. It's a special kind of mushroom that came from the Mario Bros game series, specifically the kart series. This mushroom normally has an appearance of a Super Mushroom, but it's completely made of gold with a small crown decorated with red gems on its cap. It grants indefinite speed boosts for a limited time.
See also
This tag implicates mushroom, mario_bros (learn more).