cheap shot

• cheap-shot, cheapshot

cheap shot (plural cheap shots)

1. A deliberate, unsportsmanlike, and potentially illegal act of aggression against an opponent.

   Attacking a goalie trying to make a save is a total cheap shot, I think.

2. (by analogy) A remark that unfairly disparages an obvious vulnerability of the target.

   School bullies always take cheap shots at kids with glasses.

• (an unfair remark): low blow