Definition from Wiktionary, the free dictionary
- (Ireland, archaic) an expression of surprise
1901, Kate Douglas Wiggin, Penelope's Irish Experiences:
- Och! musha bedad, man alive, but it's a fine counthry over here, and it bangs all the jewel of a view we do be havin' from the windys, begorra!
1895, Barlow Jane, Strangers at Lisconnel:
- When her neighbour, Mrs. Ryan, looked in, she could not forbear mentioning the expected call, and was further elated because Mrs. Ryan at once remarked: "Sure, 'twill be Bessy he's after," though she herself, of course, disclaimed the idea, saying: "Och musha, ma'am, not at all."
1841, Charles Lever, Charles O'Malley, The Irish Dragoon, Volume 1 (of 2):
- Well, here now, here's five hogs to begin with; and, musha, but I never thought I'd be spending my loose change that way.'