#mdd

What does "mdd" mean?
MiamiDesignDistrict, MajorDepressiveDisorder, MakeDoDia, MothersDayDate, MulherDeDeus, mothersDayDinner, MaeDeDois, MothersDayDinner, MedicalDeviceDevelopment, MenuDoDia, my_dear_dear, MotherDaughterDance, ModeloDelDía, MamãeDeDog, MothersDayDrinks, MomentoDelDulce, MomDaughterDuo, MyDerbyDeens, MyDollarDesign, MiguelDaDinda, melli_devils_darling, MadreDeDios, MrDsDiner, MummyDaughterDays, MothersDayDominican, MrDraperDubai, MensagemDoDia, MesaDeDoces, McDonnellDouglas, modern_decoration_design