conk UK /kɒŋk/US /kɑŋk/noun 3verb 4forms 3phrases 2 noun3 •(slang) A nose, especially a large one. •The shelf- or bracket-shaped fruiting body of a bracket fungus (also called a shelf fungus), i.e. a mushroom growing off a tree trunk. •(US, old-fashioned) A hairstyle involving the chemical straightening and styling of kinky hair. verb4 •(informal) To fail or show signs of failing, cease operating, break down.Therefore, have two or more engines, so that there is still some power left if one engine conks. — 1921 •(informal) To become unconscious. •(slang) To hit, especially on the head. •(US, old-fashioned) To chemically straighten tightly curled hair.The barbecue cook, wearing a dirty white apron, his conked hair reddish and metallic in the pale sun, and a cigarette between his lips, stood in the doorway, watching them. — 1957 formsconked · conking · conks Phrases with conk conk offTo die, kill or fall asleep. conk outTo stop functioning.