(n.) Fungus that appears between hordes of dancing badgers that appear from nowhere. After fives sets of "mushroom mushroom", a snake is brought in to give the mushrooms a rest. The whole process repeats over and over.
(abbr.) Mushroom cloud, the shape of smoke from atomic or nuclear bombing.
(n.) a person with a large forehead, dispropotinal to the jaw and lower face.
I was going to post about badgers, but that word is mentioned enough in other definitions