Language / Harmless old-fashioned Polish swear words/phrases [159]

I am a published author writing about Polish-American immigrants in midwest America during the 20s and 30s. I would like to know some simple AND HARMLESS Polish swear words/phrases that an older man might use in anger. I remember my grandfather's, which is not that harmless.I can only spell it phonetically:"Pshaw-clef," which I think means, literally, "dog's blood." But it translates, certainly, into something more coarse.

Thank you!