1
A jack nasty is when a dude who can’t get laid goes off in a room full of tissues, then leaves a pile of used tissues under his bed that smells like old gym socks and regret.
My cousin’s jack nasty is so bad, his bed looks like a crime scene.
Jack nasty is the reason my brother’s room has a stink that can knock you out.
That jack nasty under my sister’s bed is gonna be the death of me.