Definition of eff in English:


verb & noun

  • Used as a euphemism for ‘fuck’

    ‘he told plenty of journalists to eff off’


  • eff and blind

    • informal Use expletives; swear.

      ‘I scrabbled for my clothes, effing and blinding’
      • ‘Far better, then, to get a whole bunch of ordinary people for him to humiliate and eff and blind at instead.’
      • ‘He used to eff and blind at me but he was a superb coach.’
      • ‘They never get in trouble when they eff and blind at home.’
      curse, blaspheme, utter profanities, utter oaths, be foul-mouthed, use bad language, use foul language, be blasphemous, take the lord's name in vain, swear like a trooper, damn
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1950s: the letter F represented as a word.