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A pubic area that has full grown and ungroomed pubic hair, resembling that of pubic area of an unshowered/ungroomed person during the midieval times (due to a lack of knowledge in the pubic grooming trade).
"Ew, you can tell that girl doesn't shower and has the dirtiest midieval bush!"

"No, I would not go down on Cate Blanchette in Robin Hood, celebrity or not, during that era she definately had a midieval bush."

"I've been backpacking for 2 weeks now, I'm starting to get a midieval bush."
by gongshowhost March 27, 2011