know what hit one

idiom

used in negative statements to say that something one did not expect surprised one very much
I didn't know what hit me—suddenly I just felt so dizzy.
The company came out with an entirely new line of products last year, and their competitors never knew what hit them.

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Cite this Entry

“Know what hit one.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/know%20what%20hit%20one. Accessed 21 May. 2024.

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