(idiomatic, especially US) Alternative form of have another think coming

I believe that is the case, but am not certain.

I think what has been said is untrue. / (sarcastic) No, absolutely not (used to refuse or decline something proposed).

(idiomatic) A group of people who collectively perform research and develop reports and recommendations on topics relating to strategic planning or public policy, and which is usually funded by corporate, government, or special interests.

(idiomatic) Thinking that is not grounded or in touch with the realities of the present; open-minded thinking.

Thought; gerund of think.

present participle of think

(informal) A thing (used to refer to something vaguely or when one cannot recall its name). / (slang, euphemistic) Penis.

One who spends time thinking, contemplating or meditating. / An intellectual, such as a philosopher or theologian. / (slang) The brain, mind. / (slang) A poser; a conundrum that requires some thinking.

(idiomatic, psychology) The illusion that what one would like to be true is actually true. / (idiomatic) Decision-making based on self-delusion.