mappen🔊advEtymology Blend of may + happen.1UK, Dialectal, Obsolete It may happen that; maybe, perhaps.Dunnet gowl, Aggy. Mappen I'll be maister man mysel' soon.1887, Hall Caine, chapter VII, in A Son of Hagar: A Romance of Our Time […], volume I, London: Chatto and Windus, […], →OCLC, 1st book (Retro Me, Sathana), page 128: