Duly is defined as at the right time or as expected. An example of duly is a person showing up when they were supposed to arrive. in a due manner; specif., 1  as due; rightfully.  when due; at the right time.
If you eat a high-fat meal, you will feel tired after eating because fat is harder for the body to digest than carbohydrates and protein. When you eat a lot of fat, your digestive system becomes sluggish, and your body sends more blood to your digestive organs so that the job of digesting your food can be done.ood Allergies. A classic symptom of food allergies is feeling tired after eating a food you are allergic too. Common food allergies include gluten (the protein in wheat), dairy products and tree nuts, but sensitivity to any food can cause fatigue.
Approximately three hours after eating a complete meal, you should feel hungry. It may occur even sooner if you're eating five to six smaller meals a day. If you don't, it may be for one of the reasons below. 1  Low blood sugar from not eating properly.2  You might feel tired, irritable, lightheaded or jittery, and you don't recognize these feelings as hunger.t may occur even sooner if you're eating five to six smaller meals a day. If you don't, it may be for one of the reasons below. 1  Low blood sugar from not eating properly. 2  You might feel tired, irritable, lightheaded or jittery, and you don't recognize these feelings as hunger.