Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “you must be joking”

you must be joking

(also you've got to be joking)
B1 said in answer to something that someone has said, meaning that you do not believe they need said it seriously, or you think it is a stupid thing to say: You've got to be joking if you think I'm going to stand in the rain watching you play rugby!Not believing
(Definition of you must be joking from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

Translations of “you must be joking”

Word of the Day

stampede

When animals or people stampede, they all move quickly in the same direction, often because they are frightened.

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More