b-parts
The body below the waist, in particular the genitals, buttocks, and anus.
From Gundam where in some of the series when the mecha breaks in half, the two halves are called the "A parts" and the "B parts".
From Gundam where in some of the series when the mecha breaks in half, the two halves are called the "A parts" and the "B parts".
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