Meaning of you must be kidding in English:

you must be kidding

(also you have to be kidding)

phrase

informal
  • Used to express incredulity about someone's actions or claims.

    ‘two hours to make a hot dog—you must be kidding’
    • ‘Drop the price by £ 50,000, one said. You must be kidding, I told him.’
    • ‘Do you think you can do all these things in 45 minutes? You must be kidding!’
    • ‘You liked it? You have to be kidding me.’
    • ‘Our job is challenging at times, but when you add a couple feet of snow, it's like, you've got to be kidding me.’
    • ‘You've got to be kidding if you think this administration wants people to conserve energy.’