get on (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 gets on his hobby-horse about the government, there's no stopping him!

Common Names:

Name	Pronounced	Usage
Nahum	NAY-əm (English), NAY-həm (English)	Biblical
Kit	[kit]
Shareef	-	Arabic
Monat	-	Irish
Sa'ida	-	Arabic
Kelia	-	English (Rare)