Right from the heart. Often used to describe an unexpectedly sincere, touching moment. Can produce warm, fuzzy, feel good, emotions and/or a smile in the toughest, coldest people.
Big negro, big gun. The description of an assailant, usually by a white victim.
On the Middle Ground episode of "The Wire", a victim who survived a gang hit describes the assailant as a big black guy with a big gun. The police look at each other, say BNBG and laugh.