Stomach of the Ox

This is when you have a stomach that can endure eating everything including rotten cheese. Lets just paint the picture.. You are sitting with your friends eating some taco soup and you reach into the fridge for some cheese to put on top..... you didnt know it but the cheese expired by quite a bit...... you all partake in the full meal including the cheese. Shortly everyone gets sick except one........ That person is crowned with the the prize..... They have STOMACH OF THE OX!!