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A person who tends to use long words.
Phil is a hippopotomonstrosesquippedalian. I think he just keeps using long words to sound smart.
by KOOOOPOOPPPOOOLLLOOO January 18, 2021
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I have a fear of big words and there's a name for this fear but I don't want to say it because it's a big word.

Hippopotomonstrosesquippedalio
by hellorther June 29, 2014
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Girl 1: Hey remember in Mary Poppins when she sang that song, Supercalifragilisticexpialidocious?

Girl 2: AAAAAHH!!!!!!!!!!!!!! STOP IT!!!!!!!!!

Girl 1: Whoa, what's wrong? Do you have Hippopotomonstrosesquippedaliophobia?

Girl 2: STOP SAYING THOSE WORDS!!!!!!!!!!!!!!!
by Anya likes spaghetti and bread November 26, 2013
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It is actually the never ending fear of long words .
If you don't believe me look it up
Alice: So doc' is there anything wrong
Doc: I'm affraid you have hippopotomonstrosesquippedaliophobia
Alice: AAAAAAARGH MAKE IT STOP PLEASE NO AAAAAAAAARG
Doc: they should make an abreviation for this ...
by Rhinostril February 6, 2014
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The art of using VERY long words to confuse people. It comes from the root 'sesquipedalian', which means one who uses long words to (again) confuse people. Source: Mrs. Burns Dictionary of Obscure, and Preposterous Words.
Hippopotomonstrosesquipedalianism is the art of utilizing extremely elongated lexicons to give the appearance of being more intelligent to one's acquaintances.
by Dan Richards February 20, 2008
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I suffer from HippopotomonYEEEAAAAARRRRGGGGGGGGHHHHHHHHHHH WE'RE ALL GONNA DIE!!!!!!!!!!!!!!!!
by Al Berry March 1, 2004
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Fear of big words, quite ironic when you think about it
Mitch is hippopotomonstrosesquippedaliophobic, so words like plutoniumscare him.
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