The phrase “6-7” originates from the song Doot Doot (6 7) by the rapper Skrilla, released in December 2024, where the lyric “6-7, I just bipped right on the highway” appears.  It gained viral traction on TikTok and Instagram starting in early 2025 — in many edits, the phrase was used in clips of the basketball player LaMelo Ball (who is height 6’7″) and in other meme-style videos.

What makes “6-7” interesting is that it doesn’t carry a clear literal meaning for most of its users. Some have speculated it refers to 67th Street in Philadelphia (where Skrilla has ties) or the police code “10-67” (a fatality). But many teens and Gen Alpha users simply employ it as a playful, nonsensical catchphrase — sometimes with a hand gesture — to respond to questions, disrupt whatever’s going on, or just join in the joke.

The trend has spread into classrooms and become disruptive enough that some schools and teachers have banned the phrase. At the same time, it’s been recognized as a hallmark of viral culture: it shows how something that starts as a lyric can mutate into an inside joke, shared among younger generations even if older people are left wondering “What is 6-7?”