When you are doing a Japanese girl from behind and accidently (or on purpose) end up darting the wrong hole. She turns around and in her coy, Japanese, blushing way says..."Ahh Soo" with a little giggle.
During my recent trip to Japan I got drunk and ended up in a karaoke bar. I took this amazing girl home but was too drunk to stay focused doing it doggy style and ended up with a blushing geisha.
When you learn about something through another's post on sites/services such as Facebook, Twitter, MySpace, etc. Similar to "Word-of-Mouth". The information can be negative or positive and is simply a means of being exposed to information.
I learned about a great new product through word-of-post on John's Facebook Wall.