Idiom of the day :- Coffin nail

Usage, examples and definition of the Idiom :-

Since about 1890 people have recognized that cigarette smoking does indeed damage one’s health for even then they said that each cigarette a person smoked drove another nail in his coffin. That led to a cigarette being called ( in slang ) a coffin nail. ‘I stopped smoking,’ Hank said. ‘I haven’t had a coffin nail in three months.’