dream up

US /ˌdriːm ˈʌp/
UK /ˌdriːm ˈʌp/
"dream up" picture
1.

to invent something in your mind, especially something unusual or impractical

:
•
He dreamed up a crazy plan to travel around the world in a hot air balloon.
•
Where did you dream up that ridiculous idea?
:
inventdevisecontriveconcoctimagine
:
dreamdream ticketpipe dreamon the up and upupup tobeyond your wildest dreams