Noun
fastback (plural fastbacks)
A motor car having a continuous slope from the roof to the rear
Better update your whiplash insurance if you're planning on driving Mitch Medford's Zombie 222, an electrified vintage Mustang fastback that can sprint from 0 to 60mph in a neck-snapping 1.94 seconds! Source: Internet
In 1970, Datsun introduced a new sports car to the market named the Z. It featured a fastback styled body based off of European styling and a focus on performance and price. Source: Internet
The long-hood/short deck proportions would work well for an FWD layout, and the rear seems to be a straight fastback slope from roof to the bumper line. Source: Internet