I have learned two things today. When someone says "I don't know what that means", and you are in a position to explain what it means, the first thing you should say is "Would you like me to explain what it means?". This will give them an opportunity to say "No, thank you" because sometimes, ironically, it is just for your information.
The second thing I learned today is hipster pants are the new red and midriff tops are the new green. In fact midriff tops are the new lime green. Inauspiciously, cleavage is the new black, but really you should wear something more radical.