A combination of "model" and "dull" indicating an attractive person with no personality.
"I really hope I find a life-partner for a loving committed relationship soon. I sometimes wonder if I'll ever find anyone I can truly connect with. Do you ever have these feelings Charlotte?"
"No, I just want to bag a modull, talking hurts my mouth.."
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