the.com/shiv

means A crude, improvised knife — often homemade, often hidden, often meant to settle something fast.

from Likely from British Romani 'chiv' or 'shiv,' meaning knife or blade, which itself traces back toward Romani words rooted in older Indic language. The term rode into English through Romani-influenced slang and thieves' cant, then got adopted and hardened inside prison walls, where 'shiv' became the word for whatever sharp thing you could sneak past a guard — a toothbrush, a spoon, a bedspring, anything with an edge and bad intentions.