"trunk lip" is a phrase used to describe the small, raised edge or lip found at the opening of a car's trunk. It helps to keep the items inside the trunk from falling out or sliding around while the car is moving. Full definition
The rear glass extends at a shallow angle even further out toward a flat trunk lip, which is flanked by a set of dramatically styled taillights. (automobilemag.com)
As for the WRX STI Limited, there is now a no - cost option to have more subtle trunk lip spoiler in place of the car's standard enormous rear wing. (automobilemag.com)
The large front air ducts and heavily flared wheel arches look menacing, and then there's just a small, tasteful trunk lip spoiler out back. (autoweek.com)