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The ultimate flex for your navel. Experts say Josh made it up, but no one cares because it’s way better than just saying belly button. Also, it’s basically a middle finger to everyone who doesn’t know the term.
Yo, I got a b button. You got a belly button? That’s weak.
He showed off his b button like it was a trophy.
You think you’re cool? I got a b button and you got a pizza.