It's when you eat the same food or meal day after day after day. According to Priscilla, Elvis ate meatloaf for dinner every night for 8 months. If Elvis was the king, I was the queen of food ruts. But if you're trying to lose weight or eat healthier, then it's time to climb out of that food rut. Boring your poor taste buds to death causes them to crave more food because they can't get no satisfaction.
More food equals more calories, which equals larger jumpsuits.
Even when it comes to healthy foods, eating the same ones every day means that you're shortchanging yourself nutritionally. Having cereal and a banana for breakfast is great, but not if you have it every day. Good health comes from eating a wide variety of foods because you need a wide array of nutrients to be healthy. If you're wondering if you can replace those missing nutrients with supplements, the answer is no. If you've been eating the same food or meal every day for more than a month, then you've attained streak status.