thorn in (one's) side

A person or thing that is frequently problematic and/or annoying. My new neighbors blast music at all hours of the day and night—they're a real thorn in my side My car has become such a thorn in my side—today is the third day this week that it wouldn't start!

Common Names:

Name	Pronounced	Usage
Derry	-	Irish
Jeffery	['dʒefri]
Jezza	JEZ-ə	English (British)
Marni	-	English
Karolina	kah-raw-LEE-nah (Polish), kah-ro-LEE-nah (Swedish, German)	Polish, Swedish, Norwegian, Danish, Hungarian, Slovene, Croatian, Macedonian, Lithuanian, German
Romilda	-	Italian, Ancient Germanic