Nicknames

I'm not sure how many people actually do this, but I always make up nicknames for people I see but never actually talk to. There are these two people that are in my Bio class that are constantly making out with each other, so my friend and I call them the siamese twins. There is a woman that always comes into work and orders a milkshake made with only one scoop of ice cream. We call her one-scoop. I feel like every one makes up nicknames for these people. There are so many people that you see all the time but you don't actually know.