adjective: (figuratively, sometimes offensive) Exhibiting an obsessive tendency.
noun: (medicine, psychology) Initialism of obsessive-compulsive disorder. [(medicine, psychology) A mental disorder characterized by an obsessive compulsion to repeatedly perform trivial or meaningless actions.]
noun: (medicine) Initialism of osteochondritis dissecans. [(medicine) A disorder of the joints in which cracks form in the articular cartilage and the underlying subchondral bone.]
