You must be joking!

(informal)

something that you say in order to tell someone you do not think something they have said is serious because it is not likely to be true or to happen 'Did Alex get you a present, then?' 'You must be joking! He didn't even remember it was my birthday.'

Common Names:

Name	Pronounced	Usage
Jeannot	zha-NO	French
Fridwald	-	Ancient Germanic
Alfhild	-	Norwegian, Swedish
Reem	-	Arabic
Anson	AN-sən	English
Lothair	-	History