a cheap shot

US /ə tʃiːp ʃɑt/
UK /ə tʃiːp ʃɑt/
"a cheap shot" picture
1.

serangan murahan, pukulan murah

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.
Komentarnya tentang kesalahan masa lalunya adalah serangan murahan.
The politician took a cheap shot at his opponent's family.
Politikus itu melancarkan serangan murahan terhadap keluarga lawannya.