A properly prepared cheat meal won’t directly hurt your diet, your body or your progress—in reality, it can actually help with long term diet adherence.
Nevertheless, don’t use your cheat meal as an excuse to completely overindulge. Instead, go for a meal that is still well-balanced, while being higher in both calories and carbohydrates than your normal diet—for instance, two slices of pizza, a cheeseburger, pasta with a protein-rich sauce, shrimp or chicken fajitas, chicken stir fry with noodles or rice, or filet mignon with baked potato and vegetables.
The best way to cheat is to plan beforehand. Keep in mind, while cheat meals help satisfy cravings and give you a chance to loosen the reigns, they shouldn’t turn into cheat days.