Spodzielny dźwięk

"Here are five common idioms you’ve probably heard before: 1. Break the ice, which means to start talking. 2. Piece of cake, meaning something is very easy. 3. Hit the books, which means to start studying hard. 4. Once in a blue moon, for things that happen very rarely. 5. And under the weather, which simply means you’re feeling a bit sick."