cheap shot

English Thesaurus

1. an illegal and unsportsmanlike act of unnecessary violence (noun.act)

hypernym	:	shot,
definition	:	a blow hard enough to cause injury (noun.act)

2. an unnecessarily aggressive and unfair remark directed at a defenseless person (noun.communication)

hypernym	:	barb, dig, gibe, jibe, shaft, shot, slam,
definition	:	an aggressive remark directed at a person like a missile and intended to have a telling effect (noun.communication)