7 definitions
6-7 (n.) is a nonsense phrase shouted by kids, often with a palms-up weighing gesture, that means nothing in particular.
6-7 (n.) is Dada, performed at recess.
6-7 (n.) is a math teacher's nightmare: two perfectly innocent numbers, now unusable.
6-7 (n.) is a password into childhood that gets changed the moment an adult says it.
6-7 (n.) is a Word of the Year whose official definition is basically a shrug.
6-7 (n.) is an inside joke where everyone's inside and nobody can find the joke.
6-7 (n.) is weighing two invisible grapefruits and announcing the verdict to the whole cafeteria.