Japanese

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For pronunciation and definitions of パイパン – see the following entry.
白板
[noun] (mahjong) The white dragon playing-tile, especially as depicted without any markings.
[noun] (by extension) The absence of pubic hair, usually of a female, either naturally or due to removal; pudendal glabrousness.
(This term, パイパン (paipan), is the katakana spelling of the above term.)