Definition of OICQ QQ, originally called OICQ, is the most popular free instant messaging computer program in China. It's the product developed by Tencent Inc. in February, 1999. Tencent company has changed its name to QQ later because ICQ accused it of using a similar name with its product ICQ. It's estimated that the users of QQ in China number more than 15,000,000. QQ'ing is sometimes used on the Internet as an abbreviation for crying.