Teaching ( your ) grandmother to suck eggs is an English language saying that refers to a person giving advice to another person in a subject with which the other person is already familiar ( and probably more so than the first person ) Wikipedia. org@ 🔰teach your grandmother to suck eggs🔰 UK disapproving to give advice to someone about a subject that they already know more about than you CambridgeDictionary@ to tell someone how to do something when they can already easily do it MacmillanDictionary@ معادل : *جلو قاضی و معلق بازی؟* ❇️PROVERB ❇️SAYING ❇️IDIOM