I don’t personally think ’natter’ is sexist in the way ‘nag’ and ‘gossip’ are, and it definitely seems to have fewer negative connotations (I think ‘gossip’ can be used negatively and lightheartedly and is possibly experiencing a bit of rehabilitation at present eg ‘two friends having a good old gossip’ but ‘nagging’ is always a bad thing).
I wondered if our differing opinions might reflect regional variation so I did a little research (unlike OP, who seems to have done a runner already)!
(Mumsnet loves deleting my drafts when I go off link collecting so I’m resorting to screen shots, I tried to leave the URLs visible, so that readers can follow up if they want to)
The way ‘natter is used has definitely changed over time - nowadays I think it’s most often used to describe friendly, enthusiastic chat that is largely inconsequential (perhaps easily derided if you don’t particularly value human to human interaction) but in the 1800s it was seemingly more or less synonymous with ‘grumble’
Weirdly, Dictionary.com makes the verb form seem more negative than the noun?
But thinking about it, perhaps something similar occurs with chat/chatting and chatter/chattering? if someone described me as ‘over there, having a chat with x’ it would feel a lot less judgemental than ‘over there, chattering to x’.
Vocabulary.com says to natter is ‘to chatter, to blather, to jabber’, but the examples they go on to suggest seem quite positive and friendly and I don’t think anyone would realistically substitute blather or jabber for natter when referring to a lighthearted phone conversation with a best friend!
Wordsense says that In Scotland, natter is synonymous with nag, so that’s one explanation for the sexist/negative connotation…
(to be continued… can only do 5 images per post!)