Tuck into Definition 1 of 3Pro Tip 1/3Appetite Expression Used to show strong hunger or enthusiasm towards the meal being started. After the long hike, I'm ready to tuck into a big meal. Pro Tip 2/3Social Eating Often used when eating in company, showing shared enjoyment of the food. We all tucked into the pizza as soon as it arrived. Pro Tip 3/3Not for Snacks Typically not used for eating small amounts of food or snacks. We don't say 'tucked into nuts', but rather 'tucked into a hearty stew'.