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To smoke cigarettes continuously, such that one begins a new cigarette as (or almost as) soon as the last one is extinguished. My grandmother died of emphysema after chain smoking for most of her adult life.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
in. to smoke cigarette after cigarette. (As if each cigarette were a link in a chain.) I never wanted to chain-smoke, but I got addicted.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.