A more gratuitous derivative of the simple Your Mom, in which someone describes having sexual relations with another's mother in an attempt to offend or shock them. While it almost always used either sarcastically or as a form of trolling, it can also be found being used by typical players in online gaming matches who have decided that actual insults simply did not display their rage thoroughly enough.
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