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a tiny version of a beat box, like when a beat box is so bad it gets shrunk and thrown in the trash with the rest of your failed dreams
My cousin tried to B-Box at the party and it sounded like a cat with a broken recorder
The beat box at the concert was so good, it turned into a B-Box and then a full-on dance party
My dog tried to B-Box and it just sounded like he was choking on a bag of chips