think again

idiom

Definition of think again

informal
used to say that what someone believes, expects, etc., is not true or will not happenIf you think you can get away with this, think again.

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“Think again.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/think%20again. Accessed 27 Feb. 2020.

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