Definitions by VOSSY
pneumono ultramicroscopicsilicovolcanokoniosis
It is a respiratory disease where you breath in volcanic dust or other fine silicon dust. Also a really long word you can say to impress your friends, and make you seem smart.
Pranda got pneumono ultramicroscopicsilicovolcanokoniosis after he climbed into an active volcan and took a deep breath.
pneumono ultramicroscopicsilicovolcanokoniosis by Vossy May 30, 2006