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Boob to Body Mass Index. It tells you how big a girl's boobs are compared to how fat she is. Big boobs don't mean much if she looks like a sausage.
My B. B. M. I. is 1000. My body is 10. I’m a legend.
She has 36D melons but looks like she was hit by a truck. Her B. B. M. I. is a disaster.
I asked him what his B. B. M. I. was. He said, 'I don’t know, but I look good in a tank top.'