Answer:Here are five idiomatic expressions:1. **Break the ice** - To initiate conversation in a social setting, making people feel more comfortable. 2. **Spill the beans** - To reveal a secret or disclose information that was meant to be kept confidential. 3. **Hit the nail on the head** - To be exactly right about something; to identify the exact issue. 4. **Under the weather** - Feeling ill or unwell. 5. **Piece of cake** - Something that is very easy to do.