The term "curb weight" refers to the total weight of a vehicle when it is fully loaded with fuel, fluids, and accessories, but not including any occupants or cargo. Full definition
All the new content combines to take back about 120 pounds of that, for a net drop in curb weight of about 100 pounds despite all the new stuff. (autoweek.com)
A low curb weight corresponds to an improvement not only in fuel economy but all other dynamic areas. (thekoreancarblog.com)
Interestingly, there is a big difference in curb weights between the two cars, as well. (topspeed.com)