time to pull out the gemini
"6-7" is a popular, mostly meaningless phrase used by young adolescents (typically ages 11–14) to represent a sense of solidarity, belonging, and inside-joke humor. It has gained popularity in school environments, social media, and on merchandise, often acting as a social signal rather than a phrase with a specific definition.
Meaning: It has no specific semantic meaning, acting more as a social marker.
Origin: It is popular among younger teens to create a shared, inside-joke experience.
Usage: It appears on clothes, at sporting events, and in online spaces to show you are "in the know".
If the phrase is used as "at sixes and sevens," it is an idiom meaning to be in a state of confusion, disarray, or disagreement, according to Collins Dictionary.