Definition of "begorra"

But, begorra, whin they seen it was raly Bill Malowney himself that was in it, it was only who'd be foremost out agin, tumblin' backways, one over another, and his raverence roarin' an' cursin' them like mad for not waitin' for him.

January - June 1850, “Bill Malowney's Taste of Love and Glory”, in The Dublin University Magazine: A Literary and Political Journal‎, volume 35, page 698

Begorra, an' 'twas th' foinest sight yez niver saw to' see th' refor-rumed naughty-twos mate their dear lovin' home-definder, Carrie Nation.

1902, University of Michigan, The Wolverine‎, volume 2, number 12, page 18

But it's absolute balderdash, Bertie. I mean, listen to this: "Sure and begorra, I don't know what's after being the matter with you, Michael." I mean, what on earth is this "what's after being" stuff mean?B.W. Wooster: My dear old Gussie, that is how people think Irish people talk.

1992 April 26, “Hot Off the Press”, in Jeeves and Wooster, season 3, episode 5, spoken by A. Fink-Nottle (Richard Garnett)

Sure and begorra, 'twas the second time I lost me balance and fell into yer drink.

2009, Patti B. Pruitt, Spring Break with Paddy O'Rourke‎, book II, page 28