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noun
fear or a phobia concerning the number 13.
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What does this have to do with President Franklin D. Roosevelt? Turns out President Roosevelt suffered from triskaidekaphobia. The President did not like to travel on Friday the 13th.
Journalist and Roosevelt biographer John Gunther wrote, “Like most people with good luck, FDR was moderately—not excessively—superstitious. He hated Friday the thirteenth, he would never start an important trip on a Friday if he could help it, and he disliked sitting down with thirteen at dinner.”So much for, “let me assert my firm belief that the only thing we have to fear is fear itself..."
Franklin D. Roosevelt died on Thursday, April 12, 1945, so maybe 13 wasn't out to get him after all.