The phrase appears to have its roots in a song by the Philadelphia rapper Skrilla, perhaps referring to 67th Street; from there, it was used in videos featuring the 6ft-7in NBA player LaMelo Ball, and Taylen Kinney, a 17-year-old basketball star, helped it go viral when he used the phrase to rank a drink from Starbucks. It’s often accompanied by upturned palms rising and falling. But the specifics don’t hugely matter. It’s just something people like to say – or did, before adults picked up on it. The same is true of words like “skibidi”, which Merriam-Webster calls a “nonsense internet term”. Then there are words whose meanings fluctuate, like “sigma”, which can be a compliment or part of an expression of confusion, as in “What the sigma?”