I was innocently asking for a recording of this sentence which I thought meant "Why don't we go to the bath house together" (or something like that... I found it online somewhere... Wiktionary, I think.) [can't find the place I got this from right now, is the translation in fact correct?]
However, by recording buddy "Sakura" wrote a comment next to her recording, to tell me:
Really? I did not know that, and Wiktionary did not explain it. Is this a sort of expression? Where does it come from and is it very rude or just a bit dismissive?"Не пойти ли нам всем в баню?", especially "не пойти ли вам всем в баню?" can also mean "buzz off and leave me alone!"
Is it like "get lost!" or something like that?