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What does SIR Stand For in Internet Slang, Chat Texting & Subculture ?
For SIR we have found 440 definitions.
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What does SIR mean? We know 440 definitions for SIR abbreviation or acronym in 8 categories. Possible SIR meaning as an acronym, abbreviation, shorthand or slang term vary from category to category. Please look for them carefully.