Let's say you eat a cheat meal once every three days while cutting (pizza, boxed foods like macaroni and cheese/pasta roni, hot dogs, hamburgers)? Everyday? Once per week? How much is that going to hurt you, how will it hurt you, and why does it?
If your still going to have a calorie defecit on the days when you have a cheat meal then its not really a "cheat meal", its a "very non-productive day".
You'll have to starve yourself to allow yourself to the crap food, meaning you'll be even more hungry and eat even more.
If you have to have to "cheat" have a slice of pizza as part of a ballenced meal.
As DEF said, the more you cheat the longer it will take and the harder it will get. Also the longer it takes the more likely you are to loose intrest and go back to "old ways".