怎么跟老外用英语解释QQ啊?

It is an online communion tool like MSN or Yahoo Messenger.
It is the most widely used online chatting software in China. Currently, almost everyone has at least 1 QQ account ID.
Via QQ you can talk to your friends online and play games with your friend.
Comparing to MSN and Yahoo, QQ is more interesting and funny.

you can use qq to connect with each other.it's fuction is much like MSN,but you also can use it to play game, buy things, listen music, and see movies. use qq, you can join in the group, and talk about what you like with people who have same interests.

It is a softwear,just like MSN. You can chat with your friends by using it. And it has many intresting function.
Chinese like use it. Try it.

A software used online for chating or other entertainment

chat

icq。或者msn