67 (also written as six-seven or 6-7) is a playful, nonsensical line of slang that's gained traction among Gen Alpha and Gen Z on platforms like TikTok and Instagram. It comes from the repeated lyric in the rap song "Doot Doot (6 7)" by Skrilla, which was released on December 1, 2024.

There are many interpretations of the phrase, with people claiming:

It refers to the height of NBA player LaMelo Ball, who stands 6'7" (the song is often paired with video edits of Ball).

It's a reference to 67th Street in Philadelphia, where Skrilla is from.

It's a reference to the meaningless "mangos and mustard" trend popular among Gen Alpha ("mangos" has 6 characters and "mustard" has 7 characters)

It comes from street culture, where "67" may mean "get lost."

It has religious significance, coming from Psalm 67, where all nations are called to know God, but some choose humanity (6) over God (7).

While there are many claims as to what "67" actually means, many people use it in a nonsensical manner (including in memes), much like skibidi and yeet. Teens and tweens often say it in a monotone, rhythmic way or pair it with a quirky hand gesture as if they are balancing or juggling two weights with their hands. Therefore, to many, the slang has become an in-joke, often shouted in class or dropped in group chats to spark amusement or mild confusion.