A delicacy to some, but repulsive to most. The act of eating a chick's box while she is on her period. The taste is similar to that of a Flintstone Vitamin, which is notoriously rich in iron.

Bill: Let's grab a bite to eat. I'm starved.
Alex: I'm cool. I just left Natasha's; she fed me The Iron Sandwich. I swear she's had her period for three weeks. I actually feel like going to the gym.

Bill: You're an animal, Alex.

When you eat dirt for the first time and leave your family to build a shack in the woods