think piece
The human brain.
Lou's got one powerful think piece, man.
Any provocative essay or article that, by stating a strong opinion, arouses the reader to think about it and react to it by agreeing or disagreeing.
That article by Charles Fenyvesi on Vietnamese refugees in the Washington Post sure was a think piece!
think tank
A company of researchers who spend their time developing ideas and concepts.
The government hired a think tank to study the country's need for coins, and was advised to stop making pennies.
think twice
To think again carefully; reconsider; hesitate.
The teacher advised Lou to think twice before deciding to quit school.
think up
dream up
To invent or discover by thinking; have a new idea of. This idiom is often used for an unusual or foolish thought.
Mary thought up a funny game for the children to play.
Who thought up the idea of painting the living room walls bright red?
When asked by the teacher why she was late, the student dreamed up a plausible excuse.