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1. A bowel movement so large or violent as to be terminal.

2. A bowel movement of such density or ferocity that it feels to the taker as if he/she were passing a tombstone.
Dude, after I ate all of that Easy mac last night, I had to take a graveyard smash.
by Axel Scar November 08, 2009
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2
Having sex with a woman post-abortion
Hey bro, Stacy just got an abortion yesterday. Can’t wait to graveyard smash tonight!
by Shredder2009 September 19, 2018
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3
When you have sex and your partner dies. Either during intercourse or within the next 12 hours.
Did you hear about John last night?
- I did, his heart just stopped?
Yeah, she gave him a real graveyard smash.
by Iche bein Der schnitter October 09, 2018
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