Definition of mind-bogglingly in English:

mind-bogglingly

adverb

informal
  • See mind-boggling

    • ‘I think the government has a vast, enormous, mind-bogglingly huge responsibility here.’
    • ‘Of course, people do mind-bogglingly dumb things all the time, so you certainly can't rule it out.’
    • ‘You just won't believe how vastly, hugely, mind-bogglingly big it is.’
    • ‘These economic objectives need not be mind-bogglingly complex.’
    • ‘Sometimes it's the little things that make the difference between satisfyingly usable and mind-bogglingly frustrating.’