a phrase used at the end of a reply/quote tweet that attempts to disprove the premise in the original tweet. Users who end a tweet with this phrase are essentially signaling to the OP that they are incorrect, but not especially bothered. In most cases however, they are indeed bothered by what was said.
Ex.
Blue Check #1: “Simone Biles quit on her country and will go down in history as a national embarrassment.
Blue Check #2: “Simone Biles won several gold medals for the US, was world champion, and was under extraordinary amounts of stress because of people like you. But go off though.”