you must be joking

you must be joking

You must not be serious. What you are saying is very surprising or unreasonable. Twenty bucks for a child's ticket? You must be joking! My painting sold for $5,000? You must be joking.

See also: joke, must

Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

you must be ˈjoking!

,

you’re ˈjoking!

(informal) used to show that you do not believe something, or that you find something ridiculous: ‘It’s the best movie I’ve ever seen.’ ‘You must be joking!’ ♢ ‘The boss wants us to work late again.’ ‘What? You’re joking!’

See also: must

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