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To be a rude and bad “sigma” you must be in violation of some sort of order and [considered] a dirty sigma. The term was invented by an 8th grader in Kentucky who called one a dirty sigma. The other term, muddy sigma is mainly used for pointing out unlawful conduct, in which was invented by the same person. [The words] “Dirty sigma” can be traced back as far as 2021-2022 as a user on Reddit made a post about Dirty Sigmas lenses, in referral to [the brand] Sigma.
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