Definitions
1.nounThe Irish hobby, an extinct breed of horse.
2.nounA child's toy consisting of a (usually wooden or cloth) horse's head mounted on a stick.
3.nounA topic about which someone loves to talk at great length."Don't ask him about global warming: it's his favourite hobby horse, you'll never get away."
4.nounA puppet-like costume used in some traditional dances and festivals that gives its wearer the appearance of a man on horseback.
5.nounAn early bicycle with no pedals or brakes; a draisienne.