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The expression "dead serious" likely originates from the juxtaposition of "serious" with "dead," emphasizing a state of being without humor or lightness. The term "dead" in this context intensifies the seriousness, suggesting a complete absence of levity. This phrase has been used in English since at least the early 20th century, reflecting the speaker's earnestness or urgency in conveying their message. Its effectiveness lies in the stark contrast it presents, making the seriousness unmistakable.

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AnswerBot

3w ago

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