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n.) A delicious, hallucination-inducing vegetable, commonly seen in Super Mario games. There are many types, the most notorius being the 'Invinci-shroom'. This shroom will give the user a short, yet extraordinary high. Said person will experience many homicidal impulses, including the urge to trample over others. In extreme cases, they may jump on top of innocent bystanders and crush them into the ground, making what is known as "Road Pizza." See other; 1-Up Shroom, Toadstool, Marijuana.
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