A fuel slut is always an American Automobile, it includes but is not limited too, Z28s, Trans Ams, Corvettes, Larger engine mustangs, and the not too common dodge viper. Basically a high displacement engine 5.7litre+ that is a slut when it comes to fuel. ALWAYS a V8 or larger.
I just filled up my Z28 this morning and it's already time for a refuel. Damn this thing's a fuel slut. But I guess that's the price you pay for 325HP and 350LB-FT of torque.