What is "nothing"? E.g. "Talk about nothing"


I am trying to translate some lyrics that go like

> We can talk about nothing

then I hit a snag because I am not sure what the word for "nothing" could be.
Things that keep coming to mind:

> 話すことがない  
>  have nothing to talk about

> 何も話していない [we] are talking about nothing

Usually a sentence with "nothing" in it becomes 何も + a negative verb, but I'm
not sure it could also work in this context. What would a standalone noun for
"nothing" or "nothingness" be? I am not thinking of the
religious/philosophical concept of nothingness (e.g.
[空、無](https://japanese.stackexchange.com/questions/1646/why-
is-%E7%A9%BA-%E3%81%8F%E3%81%86-and-not-%E7%84%A1-%E3%82%80-used-to-define-
void-emptiness-in-a-buddhist-con)).

My best attempt:

> 何も話さなくてもいい

But I'm not really happy with it since "nothing" is not directly rendered.




"Talk about nothing" here I believe means talk about things that are not
important or don't matter.

In that case you could say "くだらない話をしてもいい" you could also use 意味のない話 or similar
words.

