ride (one's) hobby-horse

To frequently or incessantly talk or complain about a subject, topic, or issue in which one is excessively interested. Ah, here we go again. Once grandpa starts riding his hobby-horse about the government, there's no stopping him!

Common Names:

Name	Pronounced	Usage
Roi (2)	-	Hebrew
Shane	[ʃein]
Ione	ie-O-nee (English), IE-o-nee (English), ie-ON (English)	Greek Mythology, English
Lucile	loo-SEEL	French, English
Innokenti	-	Russian
Genowefa	ge-naw-VE-fah	Polish