Just that really. Never heard anyone say it in real life but it crops up all the time on mumsnet. Why would anyone posting their opinion think it was a gotcha? It's just a discussion! I get a real irrational grrr feeling every time I see it on here and wonder if it's just me that hates it? Why do posters using it think they're somehow tripping up another poster, or that their own opinion/post is more valid?