Boogie man

"So what are we talking -- Freddie Krueger here?"

- Lt. Colonel John Sheppard Oh, come on! We don't have a single shred of hard evidence here. I mean, until we do, this thing is just a boogeyman.

The boogie man (also spelled boogeyman, boogyman, bogyman, boogey monster) is a legendary monster. The bogeyman has no specific appearance and conceptions of the monster can vary drastically. It simply has no set appearance in the mind of a child, but is just an amorphous embodiment of terror. Rodney McKay refered to an entity that appeared to scare people in their dreams as a boogie man.