Galgore
A dumb, old name for a killer who murdered way more than one person. It came from a demon that was so bad, it made whole tribes cry and then disappeared.
"You’re a Galgore, I swear. You killed my friend and his three brothers."
"My neighbor is a Galgore. He killed 25 people for stealing his last pizza."
"My dad called me a Galgore for making a mess in the kitchen."