thorn in your side
US /θɔrn ɪn jʊər saɪd/
UK /θɔrn ɪn jʊər saɪd/
1.
肉中刺, 眼中钉
a person or thing that repeatedly causes trouble or annoyance
:
•
His younger brother has always been a thorn in his side, constantly getting into mischief.
他的弟弟一直是他的一根肉中刺，总是惹麻烦。
•
The new policy has become a real thorn in the side of many employees.
新政策已成为许多员工的真正眼中钉。