1. When a large group of Asian tourists-- the kind that are aloof and seem to be unaware of their surroundings and are roaming in a pack down the sidewalk--blocks the entire sidewalk, leaving you unable to move. The stoppage is usually caused by the group's collectively pointing at some mundane object, such as a McDonald's Arch or run down used book store.
2. Getting cock blocked by a fat chinese girl.
1. Today when I was walking near campus, I got great walled by a busload of chinese tourists pointing at the Asian Art Museum.
2. Dude I was totally about to bust a nut in my MAIN BITCH Jade Xiang's ass but her fucking friend "Rain" great walled me.