In American English, when someone responds to you by saying, "In your dreams!" does he mean that you're actually dreaming?

A: Guess what? This weekend, I caught a fish this big.

B: No way.

A: Yeah, It was huge!

B: In your dreams! There's no way you caught a fish that big.

"In your dreams" is a different way of saying, "I don't believe you" or "there's no way that's true."

It is a way to tell people that you think they are making up a story.

And this phrase is used in a playful manner, usually with a smile.

"In your dreams!"

"In your dreams!"

"In your dreams!"

And that's English in a Minute.