1. in. to talk or chat about something. Something wrong? Let’s rap about it.
2. n. a conversation; a chat. Let’s have a rap sometime.
3. n. sweet talk; seductive talk; line. Don’t lay that rap on me! You’re not my type.
4. n. a criminal charge; the blame for something. (Underworld.) The cops tried to make the rap stick, but they didn’t have enough evidence.