on someone's back

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

Name	Pronounced	Usage
Oonagh	OO-na	Irish
Teresita	-	Spanish
Christianne	-	English (Rare)
Amancio	ah-MAHN-thyo (Spanish), ah-MAHN-syo (Latin American Spanish)	Spanish, Portuguese
Monroe	[mən'rəu]
Happy	HAP-ee	English (Rare)