a cheap shot

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

billiger Trick, unfairer Angriff

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.
Sein Kommentar über ihre vergangenen Fehler war ein billiger Trick.
The politician took a cheap shot at his opponent's family.
Der Politiker hat einen billigen Trick gegen die Familie seines Gegners angewendet.