A form of punishment on the planet Remulak. The offending conehead is placed in a Colosseum-like arena containing thousands of spectators. When the garthok is released the prisoner must battle it using only a hook and short staff. If the garthok is successfully gnarfled, the prisoner regains his honor. If he fails the conehead is killed and eaten by the garthok.
You have betrayed your cone heritage; therefore, you will . . . gnarfle the garthok!
My friends and I picked up this phrase from the Coneheads movie in the early 90's. We adapted it to make fun of the guys hooking up with less than perfect girls out at the clubs or where ever.
Hey Atz what is Tim doing with that hosebeast over there?