"Zerżnąć komuś dudy"

"To give somebody’s bagpipe a thrashing"; According to Kubik this "proverbial phrase refers to corporal punishment. During the measurement of the lash / whip, the buttocks suffered most of all. The shape of the injured part of the body, resembling the leather bag of a bagpipe, as well as the panting and moans of the punished, [are] associated with the noise or sounds of the instrument being prepared for playing".