gas

be cooking on gas (British, informal, American, informal)

to be making good progress and to be likely to succeed. We're cooking on gas. Keep the work coming in like this and we'll meet the deadline.

See also: cooke

a gas guzzler (American, informal)

a car that uses a lot of fuel. I want to sell this huge gas guzzler and buy something that's cheaper to run.

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gas up (something)

to put fuel in a vehicle. We stopped at a service station to gas up the car and clean the windshield. Gas it up and check the oil.

run out of gas

to lose the energy or interest to continue. I think our team ran out of gas toward the end of the game's first quarter.

Etymology: based on the idea that when a vehicle has no more fuel it will stop moving

See also: run

step on the gas

to hurry in order to get something done quickly. If we're going to get this done today, it's time to step on the gas.

Etymology: based on the literal meaning of step on the gas (= to make a car go faster by giving the engine more gas)

See also: step