A synonym for fellatio popularised by comedian Sacha Baron Cohen's character Borat.
Due to Borat's limited understanding of English, he creates his own synonyms, presumably translations of Khazak phrases.
"I like prostitute who do mouthparty and not bite."
"My sister do best mouthparty in all of Khazakstan. I would know."
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