1 definition by Crustacean King

an irrational, idiotic manbaby. The name derives from the latin word Gruuknalia (meaning uncontrollable rage). A grunk is a person who is incapable of basic human speech and communicates only via grunts, shrugs and inchorent crying. Many teachers at a school will try to take care of a grunk and try to contain him. But from the Non-stop screaming and shaking to the constant barrage of fully used diapers, grunk(s) will usually be distributed and sent to the SCP foundation to be contained securely.
"Have you seen Greg recently? He's been out of control and acting erratically..."
"I don't know, i'm suspicious he might be a Grunk."
by Crustacean King November 20, 2018
Get the Grunk mug.