Slewacide was an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 thoroughbred

Thoroughbred

The Thoroughbred is a horse breed best known for its use in horse racing. Although the word thoroughbred is sometimes used to refer to any breed of purebred horse, it technically refers only to the Thoroughbred breed...

 racehorse foaled in Oklahoma

Oklahoma

Oklahoma is a state located in the South Central region of the United States of America. With an estimated 3,751,351 residents as of the 2010 census and a land area of 68,667 square miles , Oklahoma is the 28th most populous and 20th-largest state...

. He was out of the Buckpasser

Buckpasser

Buckpasser was an American-bred Thoroughbred racehorse who won he won nine of his eleven race starts for international record winnings for a two-year-old of $586,090. Buckpasser was leading broodmare sire in 1983, 1984 and 1989....

 mare, Evasive, by the undefeated 1977 Triple Crown

United States Triple Crown of Thoroughbred Racing

In the United States, the "Triple Crown" is usually the Triple Crown of Thoroughbred Racing, a series of three Thoroughbred horse races for three-year-old horses run in May and early June of each year consisting of the Kentucky Derby, Preakness Stakes, and Belmont Stakes.While Daily Racing Form...

 winner, Seattle Slew

Seattle Slew

Seattle Slew was an American Thoroughbred race horse who won the United States Triple Crown of Thoroughbred Racing in 1977, the tenth of eleven horses to accomplish the feat. He remains the only horse to win the Triple Crown while undefeated. In the Blood-Horse magazine List of the Top 100 U.S...

.

Raced only once, Slewacide is best known as the broodmare sire of Kentucky Derby

Kentucky Derby

The Kentucky Derby is a Grade I stakes race for three-year-old Thoroughbred horses, held annually in Louisville, Kentucky, United States on the first Saturday in May, capping the two-week-long Kentucky Derby Festival. The race is one and a quarter mile at Churchill Downs. Colts and geldings carry...

 and Preakness Stakes

Preakness Stakes

The Preakness Stakes is an American flat Thoroughbred horse race for three-year-olds held on the third Saturday in May each year at Pimlico Race Course in Baltimore, Maryland. It is a Grade I race run over a distance of 9.5 furlongs on dirt. Colts and geldings carry 126 pounds ; fillies 121 lb...

 winner, Funny Cide

Funny Cide

Funny Cide is a Thoroughbred race horse who won the Kentucky Derby and the Preakness Stakes in 2003. He is the first New York-bred horse to win the Kentucky Derby and the first gelding to win since Clyde Van Dusen in 1929.-Bloodlines:...

.

Upon retirement, Slewacide produced such stakes

Graded stakes race

A graded stakes race is a term applied since 1973 by the American Graded Stakes Committee of the Thoroughbred Owners and Breeders Association to thoroughbred horse races in the United States and Canada to describe races that derive their name from the stake, or entry fee, owners must pay...

 winners as Clevor Trevor, Mr. Ross, and Slew of Damascus.

On September 2, 2000, he was euthanized

Animal euthanasia

Animal euthanasia is the act of putting to death painlessly or allowing to die, as by withholding extreme medical measures, an animal suffering from an incurable, especially a painful, disease or condition. Euthanasia methods are designed to cause minimal pain and distress...

due to infirmities of old age.