Science Fair Project Encyclopedia
Some have elaborated this into a string of different terms involving citrus to describe the "rating" of a particular piece; a hint of citrus indicates subtle innuendo, etc. The most common derivative is lime, which denotes sexual content that is not quite explicit. A rarer tongue-in-cheek term is pineapple to refer to a story with various bizarre kinks. The use of this term (and its derivatives) is increasing in non-anime fanfiction communities.
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