A name overheard by Frodo and Sam as they travelled through Mordor. It was an insulting name for the Nazgûl, given no doubt because of the high and piercing wails used by the Ringwraiths as, for example, they swooped through the skies on their Winged Creatures. The term is only used once, and it may possibly be a simple curse employed by a single Orc, but the fact that it appears capitalised in the text implies that it may have been in more general use.