Teenoso (7 April 1980 – 4 October 1999) was an American-bred, British-trained Thoroughbred racehorse. After showing moderate form as a two-year-old, he improved in the spring of 1983 to win the Group Three Lingfield Derby Trial and the Epsom Derby, giving Lester Piggott a record ninth win in the Classic race. Teenoso was beaten in his two remaining races that year but showed good form as a four-year-old, winning the Ormonde Stakes, the Grand Prix de Saint-Cloud and, on his final appearance, the King George VI and Queen Elizabeth Stakes. He proved to be a disappointment at stud.