A sucker-punch is a sudden and unexpected attack delivered to an unsuspecting victim. There are many synonyms for this term, including blindside, cheap-shot, ambush, and surprise attack. Other words that can be used to describe this type of attack include sneak attack, hit from behind, and unprovoked assault. These words all convey the idea of an attack that is unfair, unexpected, and often delivered by someone who is not acting in good faith. It is important to understand these terms in order to avoid becoming a victim of this type of attack, and to be able to describe such incidents accurately when reporting them to others.