I've been lurking on mumsnet for a while, commenting here and there. Thought I knew what most of the acronyms stood for but have just read the acronyms page and found I've been using one of them wrong!
I have been occasionally saying "RTFT" thinking I was being pleasant by saying "read the full thread" but found that it actually means "read the fucking thread" and that I've probably inadvertently been rude to people 
Has anyone else done anything like this!? Thinking that something meant one thing when it actually meant another?