Itadakimasu is a traditional phrase said before eating a meal. It literally means "I humbly receive." It's an expression of gratitude for the food, the people who prepared it, and all living things that contributed to the meal. You say it with your hands together. For example, "いただきます！" (Let's eat!).

食事を始める前に言う感謝の言葉です。命や作ってくれた人に感謝します。「いただきます！」