When you eat a certain type of food, but you have an unpleasant experience, such as finding a bug in your food or eating spoiled food.
Roger: This one time, I started eating egg and cottage cheese
when I noticed something was wrong with the cheese... I looked at the expiring date and found out it expired a week ago... It happened like 5 months ago and I haven't ate any cottage cheese since then!
Bill: That's a pretty bad Food Trauma!