before one can blink

idiom

Definition of before one can blink

informal
: very quickly This may hurt a little, but it'll be over before you can blink.

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“Before one can blink.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/before%20one%20can%20blink. Accessed 18 Sep. 2020.

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