What is "shivs"

Usage examples of "shivs".

He made his own, out of whatever he could find, or take, or steal, parts of cars and rescued bits of machinery, which he turned into hooks and shivs, crossbows and arbalests, small mangonels and trebuchets for breaking walls, cudgels, glaives and knob-kerries.

Oscar -- at which point he would reach out and grab any pills, powders, shivs or other evidence he was handed, then sprint like a human bazooka for the nearest exit.