Definition of knacker verb from the Oxford Advanced Learner's Dictionary

     

    knacker

     verb
    verb
    BrE BrE//ˈnækə(r)//
     
    ; NAmE NAmE//ˈnækər//
     
    (British English, slang)Verb Forms present simple I / you / we / they knacker
    BrE BrE//ˈnækə(r)//
     
    ; NAmE NAmE//ˈnækər//
     
    he / she / it knackers
    BrE BrE//ˈnækəz//
     
    ; NAmE NAmE//ˈnækərz//
     
    past simple knackered
    BrE BrE//ˈnækəd//
     
    ; NAmE NAmE//ˈnækərd//
     
    past participle knackered
    BrE BrE//ˈnækəd//
     
    ; NAmE NAmE//ˈnækərd//
     
    -ing form knackering
    BrE BrE//ˈnækərɪŋ//
     
    ; NAmE NAmE//ˈnækərɪŋ//
     
     
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  1. 1knacker somebody to make somebody very tired synonym exhaust
  2. 2knacker somebody/something to injure somebody or damage something I knackered my ankle playing football.
  3. Word Origin late 16th cent. (originally denoting a harness-maker, then a slaughterer of horses): possibly from obsolete knack ‘trinket’. The word also had the sense ‘old worn-out horse’ (late 18th cent.). It is unclear whether the verb represents a figurative use of “slaughter”, or of “castrate”.