Do you feel that you have met a kindred spirit when someone gets one of your very obscure references?
Very occasionally, I come across someone else who has heard (and also memorised) this. It's thirty years old now, but still very funny.
My kindred spirit understands me better than I understand myself!
Once in a great while. I sometimes tend to use words and phrases I learned while living with my grandma, and few people still get the meaning. It makes me smile when someone does. :)