
Be cooking with gas
Colloquial Usage
Used in casual conversation, not in formal or written English.

After figuring out the controls, I'm cooking with gas in this video game!
Positive Connotation
Implies enthusiasm about the success or efficiency of an activity.

With the new software update, my laptop is really cooking with gas!
American Origin
Rooted in American English, may be less familiar to non-American English speakers.

She understands the calculus principles now and is cooking with gas.
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