1.sharp means "exactly at a that time"
Example: I'll meet you at 9 o'clock sharp. If you're late, we'll be in trouble!
2. sleep on it means "think about something before making a decision"
Example: That sounds like a good deal, but I'd like to sleep on it before I give you my final decision.
3. take it easy means "relax"
Example: I don't have any special plans for the summer. I think I'll just take it easy.
4.to get the ball rolling means "start something, especially something big"
Example: We need to get this project started as soon as possible. I'm hoping you will help me get the ball rolling.
5. up to the minute means "the most recent information"
Example: I wish I knew more about what is happening in the capital city. We need more up to the minute news.