Fear of Friday the 13th: paraskavedekatriaphobia

Or, in Pig Latin, araskavedekatriaphobiapay.

Superstition, bigotry, and prejudice, ghosts though they are, cling tenaciously to life: they are shades armed with tooth and claw. They must be grappled with unceasingly, for it is a fateful part of human destiny that it is condemned to wage perpetual war against ghosts. A shade is not easily taken by the throat and destroyed.

~Victor Hugo, Les Misérables, Pt. 2, Bk.7, Ch. 3