haymaker

slang

1. A fierce punch, especially to the head. Johnson managed to get a knockout in the third round with an incredible haymaker to Robertson's jaw. The defendant claims he only struck Mr. Miller because he was pushed into him, but bystanders say he threw a haymaker. After taking that haymaker, Jones is definitely disoriented in the ring!

2. A particularly powerful or overwhelming move, maneuver, play, etc., that proves debilitating to one's opponent. The accusation, backed up with credible evidence, could prove to be a haymaker to the senator's reelection campaign. The team cemented their lead with an incredible 13 runs in the 7th inning, a haymaker from which their rivals never stood a chance of recovering. A goal in the last seconds of a period can be a real haymaker for an inexperienced opponent.

haymaker punch

A fierce punch, especially to the head. Johnson managed to get a knockout in the third round with an incredible haymaker punch to Robertson's jaw. The defendant claims he only struck Mr. Miller because he was pushed into him, but bystanders say he threw a haymaker punch. After taking that haymaker punch, Jones is definitely disoriented in the ring!