used to tell someone that what they are hoping for is not likely to happen or to be true

"Watch. All I have to do is wink at her, and she'll come over here." "Dream on, Dave!" “你瞧着，我只要冲她眨眨眼，她就会过来。”“做梦去吧，戴夫。”

"I just want a job where I can work thirty hours a week and have enough money to buy a place like this." "Yeah, dream on!"

"I want to get paid for doing something that I love. Is that too much to ask?" "Dream on!"

"I think we should make the rich pay more tax." "Dream on. Our politicians aren't brave enough to suggest such a thing."

See also: dream verb (HOPE)