Sesquipedalianism

As a grammar and word nerd, expressions I've never heard before or don't know the meaning of pique my interest. The longer the word, the better. If nothing else, once you figure out how to pronounce it, you can always use the word to confuse the heck out of someone you want to insult lol.

Today's new-to-me word is "sesquipedalianism." Try saying that five times fast... no, really, I'll wait ⏰

Fittingly, sesquipedalianism is the tendency to use big words. According to Dictionary.com, the word is traced to the ancient Roman poet Horace. In a piece on crafting poetry, Horace wrote that one must avoid sesquipedalia verba (Latin for “words a foot and a half long”). 

I see what you did there, Horace: using a big word to denounce the use of big words... clever 😉

Source: Dictionary.com