It means everyone is probably getting sick around here and having bad days because Mercury is in retrograde. At least, that's what my co-worker once said in front of like fifteen people.
I've heard stupider believe it or not. Once some co-workers and I went outside to see the ISS pass overhead and one of them said "can they see the Earth from up there?"
I forgot to mention- this woman was the chief news anchor for the local evening TV news.