live under a rock

idiom

Definition of live under a rock

: to be unaware of things that most people know about How could you have not heard about it? Do you live under a rock?

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“Live under a rock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/live%20under%20a%20rock. Accessed 5 Dec. 2020.

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