Not to be snooty, but it is unusual that I come across a word or usage which I have never encountered before except while reading. One's spoken vocabulary is generally much smaller than the number of word's one knows the meaning of. I frequently encounter words whose meaning I cannot remember, some of which (sanguine, phlegmatic, saturnine) I have looked up a million times but can't keep straight, although even those are mostly while reading.
So I was a bit surprised to encounter 2 words in the course of my activities in 2 days that didn't elicit even a glimmer of recognition. See if you know them
1. Mangle (not the verb but as a noun)
2. Chabad (this I saw on a sign while running, which is an even more unusual source than usual)