These gas guzzlers churn out 5 percent of the nation's toxic air pollution, and anyone standing near one is inhaling that good stuff straight into their lungs.
For example, as the electric car becomes more efficient, affordable and eco-friendly, it'll be a more popular choice amongst consumers, while big gas guzzlers will be left on the lot.
When advertising a new car's efficiency, for example, it is more convincing to talk about the number of extra miles per gallon it does, rather than the equivalent percentage fall in fuel consumption.
So, the most common expression to describe a big car that uses a lot of gas is a " gas guzzler." Interestingly enough, there really isn't a common term for the opposite kind of car.