cash-back car
n.— «For more than a decade, Kempton has researched, lobbied, and agitated for these “cash-back cars.” His and other in-depth studies describe a future where electric-car owners plug in at malls, hardware stores, or home garages and earn $1,000 to $2,500 annually for the power they pump back into the system.» —“My ride? It’s a power plant” by Mark Clayton Christian Science Monitor (Boston, Massachusetts) Apr. 24, 2009. (source: Double-Tongued Dictionary)