I'm not sure if the meaning is offensive or not. Somebody wrote me in a game chat and there's nothing meaningful in google translate for "ХНЮ" while "ВСЯКУЮ" translated for "ANY".
This is shortened word which means "garbage", "nonsense" or "rubbish" with the strongest grade to express "how much is it bad" (in all meanings, but mostly in figurative, like when someone wants to express how wrong things are told to him).
The translator didn't find anything because original word lacks 2 letters, "y" and "й" (I will not write the word neither its correct translation here as I don't think it's appropriate; correct me if I'm wrong). In the context given by you I think it was used as something to express
you shouldn't tell those lies / wrong ideas / wrong assumptions / bad things to me
regarding something what was spoken about.