What does "chain smoker" mean?

One who smokes continuously, by lighting one cigarette when they finish another, as in a chain.

What is a synonym for "chain smoker"?

Common synonyms include: acidhead, addict, alcoholic, cubehead, dipsomaniac, dope fiend.

noun

noun ·Rare ·Advanced level

Noun

1
One who smokes continuously, by lighting one cigarette when they finish another, as in a chain.
2
One who habitually smokes excessively.

From chain + smoker, calque of German Kettenraucher.