ಅರ್ಥ : A topic to which one constantly reverts.
ಉದಾಹರಣೆ :
Don't get him started on his hobbyhorse.
ಅರ್ಥ : A child's plaything consisting of an imitation horse mounted on rockers. The child straddles it and pretends to ride.
ಸಮಾನಾರ್ಥಕ : hobby, rocking horse