Question

what is
pneumonoultramicroscopicsilicovolcanoconiosis

Answer 1

A disease of the lungs with a very long name. Really the disease should be called silicosis but this is a fun way to make it sound more important.

Silicosis is a disease associated with inhaling fine (ultramicroscopico) silica (silico) dust which causes problems in the lung (pneumono). The volcanoconiosis is from the dist that volcanos produce

Answer 2

an invented long word said to mean a lung disease caused by inhaling very fine ash and sand dust.