chain-smoke
From Longman Dictionary of Contemporary Englishchain-smokeˈchain-smoke verb [intransitive, transitive] SMOKEto smoke cigarettes one immediately after another —chain-smoker noun [countable]→ See Verb tableExamples from the Corpuschain-smoke• James sat silently through her speech, chain-smoking.• Although he chain-smoked cigarettes, his hands were unstained.