dreamup

verb
UK /ˈdriːmʌp/
US /ˈdriːmʌp/

To dream up something is to think of a fun or clever idea in your head.

The kids dreamed up a game with a dragon and a spaceship.


OTHER MEANINGS

2. To create something new by using your imagination.

She dreamed up a new recipe for cookies.

3. To make up a story or excuse that is not true.

He dreamed up an excuse for being late.

4. To plan something exciting or unusual.

They dreamed up a surprise party for their teacher.