Originating in the Harry Potter book series, this term represents a generic villain, or "bad guy," whose name bespeaks evil to such an extent that it should not be spoken aloud.
I've heard that 'He-who-must-not-be-named' is up to no good again!
The evil, nose less man in Harry Potter. More commonly reffered to as "Lord Voldemort" or "You Know Who". he was very evil and killed many wizards, Witches and muggles causing wizards and witches to fear him and his name.
Oh No... He Who Must Not Be Named has killed my fifth cousin twice removed... :'(
1) Harry Potter arch-villain Lord Voldemort
2) Professional wrestler and double murderer Chris Benoit
, after the WWE expunged any history of him ever having existed.
After murdering his wife and son, Chris Benoit changed from wrestling superstar into "Chris Who?", "Guy Who Never Existed", or "He Who Must Not Be Named".