Sore foot
Having your period. So that you can talk about it without people knowing. It's your own secret word.
Anna: "I have a really sore foot"
Beth: "That sucks"
Andy: "What are you guys talking about?"
Anna and Beth: "A sore foot"
Andy (walking away): "Oh"
Beth: "That sucks"
Andy: "What are you guys talking about?"
Anna and Beth: "A sore foot"
Andy (walking away): "Oh"