Anything that contributes to an early death, particularly....

(N.) Cigarette, usage pre-world war I and still continuing today.
"Whip me a pack of coffin nails to put me to a premature death"
by Kung-Fu Jesus June 21, 2004
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An old slang for cigarettes, used before they were glamorized in the early 40's-50's.
"Who in their right mind would smoke those coffin nails?"
by _Fabricated_ September 20, 2003
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A death metal band from Mississippi whose sound has progressed to include deathcore and Gothenburg influences. They are currently playing gigs and are in the process of recording their first full length demo album, Cryptcrawler.
Man, I can't wait to see Coffin Nail break it down this weekend! My ears are gonna bleed!
by Coffin Nail May 25, 2011
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A child who causes a parent so much grief and pain that he or she will send the parent to the grave soon. It is used by some Chinese parents to scold their disobedient or wayward kids.
I told you a thousand times, stop going out with that boy. How on earth did your mother give birth to a coffin nail like you?
by Jimmy Loo January 24, 2006
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