"Nie drwij dudy z balwierza, bo ci dudy ogoli"

"Don’t sneer / mock a barber’s dudy, or else he’ll shave your bagpipes [i.e. skin, buttocks]" [?]: [implying?]; NB: Regionally, Balwierz means "hairdresser"; Historically he was usually called a "Cyrulik", who (according to the English internet source) "also performed minor [sic!] surgical procedures, ranging from extracting teeth to amputating limbs".