dipping
n.β Β«Baezaβs passengers said Gonzalezβs van, which was alongside theirs, was “dipping,” a street term for a driver hitting the gas then braking and swerving to make it rock.Β» ββMan captured, admits killing father-to-be in February” by Harry Harris, Laura Casey in Oakland The Argus (California) Aug. 9, 2005. (source: Double-Tongued Dictionary)