Facetiousismistically
When someone uses a big word to make it look like they're smart, but they're just being a total pain in the ass.
She said, 'You're being facetiousismistically loud!' like it meant something.
He used the word in a tweet and got 10 likes from people who didn’t know what it meant.
My mom used it in a DM and I had to explain it to her.