What does 6, 7 mean in slang, is it brainrot? About the viral six seven trend

Are you wondering what the six seven meaning is in TikTok viral trend? Here's what to know about the 6, 7 slang expression and brainrot.
New Scientist

The most important mathematician you’ve (probably) never heard of

Alexander Grothendieck was a titan in his field, making deep connections that fuelled a revolution in mathematics, before ...

Here’s the Real Reason the Dollar Sign Is an S

However, it wasn’t until July 6, 1785 that the Continental Congress established the dollar as the official currency of the United States: the first step towards creating a national monetary system.