To get all high and mighty on mushrooms. This is a state of being evinced by happiness, hallucinations, mightyness, and the epitome of awesome. This isn't a state to be undervalued. Envy those mushroomed up.
Dude: I'm going to get all mushroomed up and find god.
Other dude: That, good sir, is an aspiration of manly proportion.
Dude: That's the only way I do.
by Mac the other February 12, 2011
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The act of giving your characters a mushroom boost before entering a level in Super Mario Wii.
Stu: Oooh - tricky level!
Dylan: Better mushroom up!
by karmap0licia January 8, 2010
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First seen in Super Mario Bros. Picking it up gives you an extra life. (duh!) Seen in about every Mario game.
Mario got teh 1-up mushroom!!!!!!!1111one
by StraightFMan August 1, 2004
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