Celine Demon
From Super-wiki
The term Celine Demon was coined on the TWOP boards on September 14, 2005, in a discussion after the airing of the 1.01 Pilot and refers to the demon who killed the Winchester brothers' mother Mary Winchester.
It derived from a misreading of the words Ceiling Demon as Celine Dion (Canadian popsinger) by TWOP-user thinkcwik. The singer's name and the nickname for the demon were meshed and the new term stuck.
- see also The Yellow-Eyed Demon