When someone's head/skull is literally filled with inches of skull, and no brain is contained within that skull. Hence, the person's head is "All bone, no brain."
Synonymous to: stupid, idiotic, not
intelligent, dumb, thoughtless,
ridiculous, childish, adolescent, Reema,
unintelligent, etc.
Reema: "I mean yeah I guess I support
gay marriage, but I don't want them to get married.... that's weird. "
Abdul: "Jesus Reema you're all bone, no brain."
Reema: "You can read arabic but
you don't know what it means? How can you read the quran/a book and not
understand what it says??"
Momo: "Bitch it's just like when you read a chemistry book. Damn all bone, no brain. "