A knife, especially a switchblade.
Origin
Shiv is of unknown origin, but it may be related to the Romany word for knife, chiv .
Quotes
Then this one cop, the guy, he pulls out a picture, shows me a photograph, see, of my shiv . Now, I gotta tell ya, this shiv of mine’s no ordinary blade.
— Ashok Mathur, Once Upon an Elephant
