Gas-guzzler commonly refers to a vehicle that makes inefficient use of fuel. The term came into wide use to describe the "Gas Guzzler Tax" and after that while discussing environmental concerns related to climate change and smog. Nowadays, gas-guzzlers are often SUVs or other semi-large vehicles that qualify as light trucks, so they don't need to obey the minimum fuel economy regulations of cars; however, gas-guzzler can also refer to classic cars (mostly American ones with large displacement V8… (More on Gas-guzzler)