Where does 'knocked up' come from?

Anthony Horowitz (Diary, 4 February) tells us he was advised by a ‘sensitivity reader’ to remove the word scalpel from a book with a Native American character lest it suggest scalps (though the words are unrelated). I’ve stumbled across the birth of a new forbidden phrase on Twitter, that social media swamp for the older

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Knocked up = make someone pregnant. ⠀ Example: She got knocked up by her boyfriend. ⠀ Example: I really hope I didn't knock her up, I'm…

No, the Phrase 'Knocked Up' Didn't Originate with Slavery

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