to communicate something to someone clearly and directly. (Informal.)
Come on, give it to me straight. I want to know exactly what happened.Quit wasting time, and tell me. Give it to me straight.
give it to (one)
To rebuke or scold one; to verbally or physically punish one. Our parents really gave it to us for coming home late last night.The headmaster gave it to the students for their disruption during class.