Paraskevidekatriaphobia
Paraskevidekatriaphobia (pair.uh.skee.vee.dek.uh.tree.uh.FOH.bee.uh)

n. Fear of Friday the 13th.

Also: paraskevidekatria phobia.
—paraskevidekatriaphobic adj., n.
—paraskevidekatriaphobe n.