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NSFK is an abbreviation for words like Not Safe For Kids, Not Suitable For Kids, but mostly accepted as Not Safe For Kids. Just like NSFW ,NSFK often used to describe online posts that are mainly associated with heavy nudity, sexual, heavy profanity and other things that could often link with pornography or things that might not be appropriate for kids and children, NFSK is used to discuss and share things that are not suitable for Kids that might be around in the fandom
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