Top Definition
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.
#flinstones #sanwich #hungry #full #cat #comma
by the eyeball June 28, 2013
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