Guns in the Trunk

A term used to declare that someone has an STD (herpes, etc.) or as a warning to others who may be pursuing someone who is high risk of having an STD.

Jimmy: Hey man, that chick over there asked me back to her place after last call.

Tom: Who? Cindy?!?

Jimmy: Yeah. Why?

Tom: Yo that bitch got guns in the trunk, bruh. She got my boy Dave a couple months back. He was pissing razor blades for a week after a night with her.