Spurious correlation is a high correlation between two random, unrelated statistics.
Harvard law student Tyler Vigen made a hilarious collection of spurious correlations to emphasize the fact that correlation does not imply causation.
Divorce and Margarine
Bedsheet Deaths and Ski Profits
Norwegian Oil and Train Accidents
Miss America and Murder
Uranium and Arcade Revenue
North Carolinian Marriage and Executions
Sour Cream and Motorcycle Accidents
Power Line Accidents and Alabaman Marriage
X-ray Deaths and Bike Accidents
Math Degrees and Suicide
Space Exploration and Sociology Degrees
Tech Expenses and Suicide
Honey Bees and Drug Possession