Top definition
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.
by Kearemme August 16, 2014
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug