Definition of a pound to a penny in English:

a pound to a penny

phrase

British
informal
  • Used to emphasize one's certainty about something.

    ‘simply think of your budget and a pound to a penny we'll have the car to suit it’
    • ‘I'd lay a pound to a penny that the first time Woking council invoke their new powers it will not be to defeat a cunning plot by international terrorists...but in a dispute over hedges or car parking.’
    • ‘But a pound to a penny in old money, Fermanagh will come out on Saturday confident of polishing off Mayo and moving on to the All-Ireland final for the first time in their history.’
    • ‘I will lay a pound to a penny that if he does reintroduce fees the money will be used not to beat educational disadvantage, but either to pay public service wages or to reduce total state spending.’