A feminine pad that is fully permeated with period blood to the point of hardening, which gives it a natural oblong shape and consistency, as well as touch texture similar to that of an oven-fresh french baguette.
Tod: "I attempted to have sex with my girl last night, but when I tried to feel her up, I was greeted with that once-a-month feminine surprise in a form of french baguette"
Sean: "French baguette? What's that?"
Tod: "A fully soaked and hardened menstrual pad, Sean"