Musha
Heard in Roscommon, Mayo, Galway and Cavan
From Irish 'Muise', meaning 'ah' or 'well' at the start of a sentence. May be used with 'Ara' before it.
Musha, 'tis an awful day;" "Ara Musha, how are ya keepin.
My word, it is a most dreadful day. Indeed, my good fellow, how are you keeping?