What is "aboyeur"

Aboyeur (1910–circa 1917) was a British Thoroughbred racehorse and sire. In a career that lasted from 1912 to 1913 he ran seven times and won two races. In June 1913 Aboyeur won the Epsom Derby at record odds of 100/1. He was awarded the race on the disqualification of Craganour after a rough and controversial race. At the end of the season he was sold and exported to Russia where he disappeared during the Revolution.