"sesquippedalio" relates to long words "phobia" is an irrational fear
"hippopoto" and "monstro" (short for hippopotamus and monster) exaggerate the length of the word
synonym: sesquippedaliophobia means exactly the same thing
Person who coined the term: So what's her deal?
Colleague: Oh, she's afraid of long words. Do we even have a word for that?
Person who coined the term: You know what we should call it? Hippopotomonstrosesquippedaliophobia!
Colleague: That's just wrong.
Hippopotomonstrosesquipedaliophobia: an, innapropriaitely named, fear of long words.
Catherine: You look positively petrified, my good sire. Do you possess hippopotomonstrosesquipedaliophobia, by chance?
Jimmy: Yeah, I have hippopotomonst- FUCK WE'RE ALL GOING TO DIEE!! LOCK THE DOORS!! LOCK THE DOOORRRRS!!