Easy, now especially in a disparaging sense; contemptibly easy.
Lazy, simplistic (especially of explanations, discussions etc.).
Effortless, fluent (of work, abilities etc.).
Of a reaction or other process, taking place readily.
More generally, any car or truck that runs on pump gas, as opposed to diesel fuel, racing fuel, or a car with an electric motor.
One who gasses, or poisons with gas.
Something highly entertaining or remarkable.
A kind of hot rod based on production models from the 1930s to mid-1960s, stripped of extraneous weight and jacked up using a truck beam axle to provide better weight distribution on acceleration.