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The punctuation used to identify a sentence as being sarcastic or rhetorical. The punctuation looks very similar to an upside down j. Mostly intended for text messaging and IM, but is excepted in all forms of written comunication.
β€œJennifer’s new boyfriend just walked in… He looks like a real winner (Insert SARCASTUS here)”

"Am I the hottest guy you know or what (Insert SARCASTUS here)"
by Tatt Medisch December 01, 2009
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