The
lesbian equivalent of
yaoi:
doujinshi or
anime fanfic featuring
sexual encounters between
female characters who, in the
original series, would probably never
dream of the idea.
Or, perhaps, the straight male equivalent of yaoi. For just as yaoi doujinshi (and slashfic) are written largely by straight women, yuri are written almost exclusively by heterosexual men.
There seem to be several yuri doujinshi involving the Dirty Pair, which should come as no surprise.
(Yes, strangely enough, Yuri can also be a person's name. It is a feminine name in Japanese (as in the case of the Dirty Pair character after whom the genre was not named), but it is a masculine one in Russian (as in Yuri Gagarin).)