on (one's) hobby-horse

(redirected from on hobbyhorse)

on (one's) hobby-horse

Frequently or incessantly talking about a subject, topic, or issue in which one is excessively interested. Ah, here we go again. Once Grandpa gets on his hobby-horse about the government, there's no stopping him! Uh oh, sounds like Janet is on her hobby-horse again about the need for healthcare reform.
See also: on
References in periodicals archive ?
A veterinarian lectured girls on hobbyhorse vaccination schedules, saying "check that the eyes are clear and there is no nasal discharge." The girls discussed hobbyhorse bloodlines and hobbyhorse temperaments, hobbyhorse training routines and hobbyhorse diets.