The original word for the fear of Friday 13.
The other word is paraskevidekatriaphobia.
bob: o shit, today is thursday 12!
jim: stfu, you just have friggatriskaidekaphobia.
The fear of Friday the thirteenth. The Frigga is for Friday, the triskai is for 3, the deka means 10, so triskaideca means 13, and phobia is the fear.
Guy 1: So what's up?
Guy 2: What date is it?
Guy 3: Friday the thirteenth.
Guy 4: Anyone here have friggatriskaidekaphobia?
Guy 2: No.
Guy 4: Not me.
Guy 1: Nope.
Guy 3: None of us.