A topic about which someone loves to talk at great length.
A child's toy consisting of a (usually wooden or cloth) horse's head mounted on a stick.
The Irish hobby, an extinct breed of horse.
A puppet-like costume used in some traditional dances and festivals that gives its wearer the appearance of a man on horseback.
An early bicycle with no pedals or brakes; a draisienne.
A recurring musical theme; a leitmotif.
An idea dominating the mind and maintained despite evidence to the contrary; (loosely), an obsession.