Wikipedia
Mop.com
mop.com is the name of a Chinese bulletin board system (BBS). Though popular in China, it has been cited as a source of controversy.
MOP (www.mop.com) is one of the most well known and influential simplified Chinese entertainment forums currently online. The site was created in October 1997. There are 28.685 million individual users on MOP, ranking it the 2nd the most popular website in the Chinese BBS network, following only Tianya.cn) The website has been called 猫扑大客栈(Mop Station)、猫扑大星球(Mop Planet), but then changed back to 猫扑 (Mop). Mop is often cited as the source of new Chinese internet slang and because of that, it is considered the "most influential BBS and forum in China."