hypermiling/ˈhaɪpəmaɪlɪŋ/EtymologyFrom hyper- + mile + -ing.nounDriving a motor vehicle slowly so as to maximize fuel efficiency.“Hypermiling, the art of driving your car so it delivers better fuel economy than the manufacturer's official figures, began in the US as a wacky journey taken by obsessives such as Wayne Gerdes, who coined the phrase and has averaged more than 180mpg in a hybrid Honda Insight.”