dream up

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

想出, 凭空捏造, 构想

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.
想出了一个乘坐热气球环游世界的疯狂计划。
Where did you dream up that ridiculous idea?
你从哪里想出那个荒谬的主意的?