Meaning : A topic to which one constantly reverts.
Example :
Don't get him started on his hobbyhorse.
Meaning : A child's plaything consisting of an imitation horse mounted on rockers. The child straddles it and pretends to ride.
Synonyms : hobby, rocking horse
Hobbyhorse ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Hobbyhorse ka matlab kya hota hai?