"Untrue things" refers to information, statements, or claims that are not accurate or correct. It means that something is false, incorrect, or not based on reality. Full definition
The very last thing we needed at that time was for a popular legal site to publish untrue things about us. (blog.advicescene.com)
He said what's nice about this show is that, unlike a lot of untrue things that get said these days, with this show, everyone knows it's lying. (sciencemag.org)
If I say nasty and untrue things about my brother to my brother that is not defamation. (law.stackexchange.com)