Just that really... when people start to doubt that a post is real someone will write "Is this a reverse?", and I was wondering what the derivation of that phrase was. I suppose it's easy enough to work out the meaning from context, but I've not seen it anywhere else online— I would expect something more along the lines of "Are you trolling us, OP?" or "Is this a windup?". I was wondering if there is maybe some bit of Mumsnet folklore that I'm missing. 🙏