If you are using WiFi in your home or in your office than you are facing the problems like someone are using your network for surfing the Internet, in simple if someone hack into your network or if you are allow someone to use your network while they are consuming all of the bandwidth now if you want to kick them you can do this. Lets consider an another example if you are using WiFi Internet on your Android phone while you are in public place like in the coffee shop, transportation system and other place and you want to use Internet but the connection is very slow because a lot different people are using the same network (bandwidth).
Now we have a wonderful android application for root user only that will cut the network connection of other people whom you want.
What Is WiFi Kill For Android
WiFiKill allows you to scan your wifi network for devices, see their vendor and cut network connection for specified devices. This way you can get rid of network hoggers.
Download & Video Tutorial for Kill WiFi
This application was available on android market but now they have pulled this application, however we have another link from where you will get the application and video tutorial of WiFi kill for android.