A loud inward scream mainly used by aliens, such as the perfagniak race. It is also used by zombies and some alien hounds. It is used as a victory yell, or a battle cry, and is sometimes used to blow out chronic smoke from a large blunt.
Two aliens are arguing over who's chronic is better, 1 claims his chronic is the best, and the other lets out a blood curdling garfeg. Then both of them decide to load a blunt and share their chronic. They both let out garfegs simultaneously.