Green’s Dictionary of Slang

(Ulster) to beat, to thump violently.

1988		J. Healy Wild One (in Magill) Mar. n.p.: A bit worse the wear for drink, he grabbed a fire extinguisher, hopped it off the bar counter to activate it and then proceeded to spray the bottles and end wall of the bar [BS].
1995		Leinster Leader (Naas, County Kildare) 9 Mar. n.p.: She told Judge Martin that Lorraine Holohan ‘hopped off me,’ and spat on her back [BS].