on someone's back

Also, on someone's case. See under off someone's back.

Name	Pronounced	Usage
Kirsten	KEER-sten (Danish, Norwegian), KUR-stən (English)	Danish, Norwegian, English
Tajana	-	Croatian, Serbian
Ballesteros	[bælə'steərɔs]
Calliope	kə-LIE-ə-pee (English)	Greek Mythology (Latinized)
Riza	-	Turkish
Farmer	['fa:mə]