Modifying the word "inhouse" where you only play with people you know in the game called Heroes of Newerth, manhouse is the same but the game mode is All pick, auto balanced, all random, no swap, no re pick.
It is called manhouses because you play what you get and prove that you are a man.
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