Cookie Monsters of death-metal music.

"While the extreme branch of heavy-metal music known as death metal is defined in part by often-vile lyrics about violence, catastrophic destruction, nihilism, anarchy and paranoia, its singing style is associated with a beloved goggle-eyed, fuzzy blue puppet.
Death-metal vocalizing is also known as Cookie Monster singing, if not in tribute to, at least in acknowledgment of, the "Sesame Street" puppet that blurts in a guttural growl, his words discharged so rapidly that they tend to collide with each other. ..."
Read more in Jim Fusilli's article Cookie Monsters of death-metal music, in Opinion Journal. (via LinkFilter.net)