Fastback (noun)

1. A car body style characterized by a sloping rear roofline, usually in a sporty design.
2. A vehicle that has a sloping rear roofline, often seen in sporty car models.

Origin:

First recorded use of the term "fastback" was in the mid-1960s, its origins are derived from the car design feature of a sloping rear roofline, which gives the car a sporty, streamlined appearance.

Examples:

1. She drives a sleek red fastback with a powerful engine.
2. The Mustang GT350 is a popular fastback model among car enthusiasts.
3. The aerodynamic design of the fastback gives it better handling at high speeds.
4. The fastback style was first popularized in the 1960s with the release of the Mustang.
5. His dream car is a vintage fastback with a V8 engine.