When a politician says some little used word such as incontrovertible, the media jump on it, then you hear people saying it in the pub when they’ve no idea what it actually means.
“I got an incontrovertible car from the used-car dealer this morning.” Something I said for a laugh, just to see if anybody twigged on. They didn’t.
Here’s one for you: floccinaucinihilipilification
Try saying that after a few beers. In fact, try saying it sober.