D defs.my
Entry 3 senses Webster, 1913

Haymaker

/(hā"māk`ẽr)/ · Hay·mak·er · IPA /ˈheɪmeɪkɚ/
01 n. One who cuts and cures hay.
  1. 1.
    One who cuts and cures hay.
  2. 2.
    A machine for curing hay in rainy weather.
  3. 3.
    A forceful punch that results in someone being knocked down or knocked out; as, he delivered a haymaker to his opponent's jaw.[slang]