Quidnunc is an 18th century word for an inquisitive or gossipy person. It is from the latin quid nunc? meaning what now?
Canard is a later word for an unfounded rumour or story and it’s root is in the old French caner ‘to quack’.
I have put them in the same entry because usually you can’t have an unfounded rumour without a gossipy person. I think I will try to use them together. ‘Stop your canard you old quidnunc’.
I found this article from 26th Jan 1827. Their quidnunc was postponed for want of room. I doubt that this quidnunc was a hugely fat woman who liked to gossip and wouldn’t fit in the room, but I just loved the mental image it bought up.