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1.
Pertains to a very long word.
Antidisestablishmentarianism is exceedingly hippopotomonstrosesquipedalian, but cannot compete with floccinaucinihilipilification.
by Ivor Biggen March 29, 2004
 
2.
A really long word that defines really long words.
We learned about Hippopotomonstrosesquipedalians in school today.
by bob izzle May 09, 2005
 
3.
Horrible, bad insult
Dude... stop being such an hippopotomonstrosesquipedalians
by Johnny G. April 06, 2005