Why is everyone saying 'not me' at the start of a sentence?

Street Quotes - BrainyQuote

Social media made y'all way too comfortable with disrespecting people and not getting punched in the face for it. -Mike Tyson [1227x931] : r/QuotesPorn

Why do I keep saying random words and sentences? This is new, I

What does it mean when I can't complete a sentence? - Quora

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What is wrong with this sentence, 'Just because you have my number

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Why do most people omit the pronoun “I” at the beginning of

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Woman 'catches man cheating' after she spots very…

Why can't people on Quora be straightforward? Why do they have to

My favourite quote of all time is a misattribution., by Caelan Huntress, Mission.org

What does it mean when I can't complete a sentence? - Quora