TUAF when someone makes food you love, but they make it with a Bad(tm) ingredient and you don't know how to explain how you can't eat it so you just suffer and eat the food you like really really painfully slowly because you have to avoid the tiny bits of evil floating around in it. If you put onions in the pot of beans, or you put tomatoes on that grilled cheese I will cry, why would you do that? It was so yummy until you made it awful! You ruined happy safe food?!