a cheap shot
US /ə tʃiːp ʃɑt/
UK /ə tʃiːp ʃɑt/

1.
비열한 공격, 치사한 수법
an unfair or unsporting remark or action, especially one made against a vulnerable person or at an opportune moment
:
•
His comment about her past mistakes was a cheap shot.
그녀의 과거 실수에 대한 그의 발언은 비열한 공격이었다.
•
The politician took a cheap shot at his opponent's family.
그 정치인은 상대방 가족에게 비열한 공격을 가했다.