I had to double check the word for rust in Polish thinking surely that it must be a typo, but no. Rdza is indeed rust in Polish. Kurwa język.
Edit: apparently a lot of other Slavic languages are similar, e.g. the equivalent of rżawczyna in Russian (don't have a Russian keyboard). Kurwa języki.
Related: AC. I live in an apartment complex in which each unit has a shitty, absurdly loud AC unit. Come 17 °C and one jackass ruins it for everyone else who might to sit outside or have their windows open. Between that and landscaping....