This is similar to the word wubu but a contraction of I Wub U Wubu. Not to be mistaken for "Ahwubuwubu" which in another language means nothing at all. Using it in this term forces the second "Wubu" to become a nickname of sorts for your love/lover.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi