haymaker

noun [专属名词]干草机；制作干草的人；强力一击

But when the bear ignored him, Moore ran at the animal and landed a punch known as a "whirling haymaker."
但是这只熊并没有理睬穆尔，随后穆尔便径直朝这只熊跑去，给了它一击'旋摆拳'。