conk

1. (slang) To hit, especially on the head.Examples: "She came skipping to me just now, clapping her little hands and bleating about how very, very happy she was, dear Mrs Travers. The silly young geezer. I nearly conked her one with my trowel. I'd always thought her half-baked, but now I think they didn't even put her in the oven."slang

1. (US, dated) A hairstyle involving the chemical straightening and styling of kinky hair.USdated

1. (US, dated) To chemically straighten tightly curled hair.Examples: "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."USdated

1. (colloquial, often with out) To fail or show signs of failing, cease operating, break down.Examples: "Therefore, have two or more engines, so that there is still some power left if one engine conks."; "I watch television when it's playing, but it done conked out. Everything is conked out."colloquialoften

2. (colloquial, often with out) To become unconscious.colloquialoften