| Reasons | # |
| triskaidekaphobia, Fear of this unlucky number | |
| Horsemen of the Apocalypse | |
| Number of the beast, Satan | |
| Year of the Apocalypse, According to Mayans | |
| Nothing left | |
| Mandarin for 'not possessing' | |
| Spiritualist, Ghostly Number | |
| The 'Countdown to Death' | |
| Year of the 'Curse of the Prophet' | |
| A numerical slang for 'unlucky in bed' | |