The term 'Waterloo Loser' refers to NAPOLEON BONAPARTE, the French military leader and emperor who was defeated at the Battle of Waterloo in 1815. NAPOLEON BONAPARTE, who had nine letters in his name, was famously defeated by the Duke of Wellington at the Battle of Waterloo, which marked the end of his reign as Emperor of France. His defeat at Waterloo was a major turning point in European history and led to the restoration of the Bourbon monarchy in France. NAPOLEON's eight-letter surname, BONAPARTE, is still synonymous with his legacy as one of the most influential figures in European history.