six seven

interjection

variants or six-seven

ˈsik(s)-ˈse-vən 

or 6 7 or 6-7 or 67

slang

—used as a nonsensical expression especially by children and young teenagers (as upon hearing or seeing the numbers 6 and 7 in succession) and often accompanied by up-and-down hand gestures as if weighing two options

… young people who have delighted in chanting "six seven" with … demonstrative hand gestures while laughing hysterically …

—Ed Ackerman

Shouting "6-7" serves as a playful way for kids to feel connected with a shared inside joke understood across classrooms, playgrounds, and even continents.

—Matt Solit

So if you hear a kid saying six-seven all the time, it's likely … because, well, everyone is saying it.

—Tim Marcin

As 6-7 went viral, teachers complained that random outbursts by their students were interrupting their lessons. Some started avoiding asking any kind of question that might result in an answer of 67.

—Rebekah Willett et al.

Word History

Etymology

Note: The interjection six seven was apparently an outgrowth of its use in the lyrics of the song "Doot Doot (6 7)" by the American rapper Skrilla (Jemille Edwards), unofficially released in December, 2024.

First Known Use

2025, in the meaning defined above