Definition of don't you believe it! in English:

don't you believe it!

phrase

  • Used to express disbelief in the truth of a statement.

    ‘he says he is left of centre, but don't you believe it’
    • ‘Well don't you believe it! We love race reports, each of which is unique and special so keep 'em coming!!’
    • ‘The campaign reinforces the message that if someone calls claiming “‘I’m from the Water Board’ - don’t you believe it, there’s no such thing!”’