Da specially-shaped urine-odor-preventing pipe-fitting dat you hafta install under your sink for your plumbing-job to be up to code.
If a homeowner complains about methane-gas smell coming up from da washbasin, da first thing you should do is check da pee-trap to see if it's in good order.
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