Hello! My wife's grandfather would say the phrase "ʃɛkrɛplj jɛɽɛ" from what I can decode from the phonetic alphabet on Wikipedia, or my best English estimation "shikrepple yere" with a flipped r if that makes no sense. He would say this when he lost a hand in poker, when she repeated it as a kid got chewed out and told not to say it, and he died without having ever said what it meant. He was stationed in Germany during the Korean War, so our best guess is something Polish..? But we can't find much that matches.

Tilderinos, can you translate what horrible phrase my wife has been casually repeating to people trying to figure it out and what language it's even in? Apologies if this is a slur or something... And thanks!