For those outside the green movement, hypermiling is defined by the word-meisters of Oxford this way: "Hypermiling" or "to hypermile" is to attempt to maximize gas mileage by making fuel-conserving adjustments to one's car and one's driving techniques. Rather than aiming for good mileage or even great mileage, hypermilers seek to push their gas tanks to the limit and achieve hypermileage, exceeding EPA ratings for miles per gallon.
So, there you have it. How long 'till hyper is replaced by wondermileage or excessivemileage? Thanks for the tip, Rebecca!
[Source: Oxford University Press Blog]