Green’s Dictionary of Slang

(Irish) a general intensifier; also as adv.

1885		Bulletin (Sydney) 14 Mar. 12/4: But he can search the Scriptures from Genesis to Revelation without finding the slightest allusion made to an up-stairs lodger learning to play the cornet, of a choir of reedy soprani, cholicy tenori, and leather-lunged bassi driving a congregation bucking mad by their worrying of the 97th Psalm.
1966		P. Boyle At Night All Cats Are Grey 133: The brock has relieved the poor bugger of half his bucking tongue.
1993		(con. 1945) S. McAughtry Touch and Go 90: I want you to get into that buckin’ train and get the hell out of buckin’ Dundalk, right?
2001		P. McCabe Emerald Germs of Ireland 360: Smashed his mother over the head with a spade and buried her in the front garden! The front bucking garden!
2012		(con. 1980s) I. Welsh Skagboys 394: We’re the buckin yins trying tae buckin well save ye!