The 🖖 emoji shows the Vulcan salute from Star Trek, with the fingers divided into two pairs. It means "live long and prosper" and signals science-fiction fandom, goodwill, or a nerdy farewell.
People use it as a distinctive hello or goodbye, especially among Star Trek fans. Outside the fandom, it can suggest peace, space, aliens, or general geek culture. It usually feels sincere but knowingly dorky, which is largely the point.
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