A fart so concentrated and large in magnitude that it explodes through your pants and Fus-Ro-Dah's any object within 200 feet, leaving a dangerous amount of fart radiation on the area for years which gives people asskemia.
1. Did you hear that Josh let out a Mushroom Fart on his date last night?
2. In 1945, two obese Americans Mushroom Farted in Hiroshima and Nagasaki and gave many Japanese people asskemia.
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