Also known as hippotomonstrosesquipedaliophobia and is a completejoke that some dumbass thought was very smart to do...
*guy with the phobia sees a long word and panics*
Me: Looks like you got hippoto-
Guy with phobia: NO NONOO DON'T SAY IT!!
Me: Why can't I say hippotomonstrosesquipedaliophobia??
Guy with phobia: *Panics*
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Fear of long words