Nickname given to a Kidou specialized Shinigami who has a tendency to lose control and go on blast-a-thon with his or her spells.
Borrowed from the popular X-man character the Juggernaught who has a large fanbase due to a popular online joke dub. Can be found on youtube.
See also Ximmernaught
Xi: It's a bird! It's a plain!
Sho: It's... it's...
Koko: Do you know who I am? I'M THE KIDOUNAUGHT BITCH!
Proggy: Pew pew!