Back in the seventies (before the revolution) I worked in Iran and one of my contacts was a radiographer who was partly Russian. He had the habit of shouting "Zapriski Fang" as an indication of surprise, anger or pleasure. He refused to tell us what it meant ("It's Russian" was all he would say). Of course my transliteration and/or 40-year memory may be incorrect. The local language was Farsi and we used English for mutual communication.
I have long wondered what it meant and today I googled/duckduckgoed it (go ahead, I saw nothing dangerous). I got zero meaningful text results but loads of images where I can see no pattern whatever.
So, what is (or was) Zapriski Fang? And what are all the images?
Edit: the pronunciation was roughly to rhyme with "a whisky bang" or "the frisky gang", with the stress on the second syllable. Other staff (doctors, nurses) would have heard him and did not react, so it is unlikely to have been a Farsi or local-dialect obscenity.