No Uninstall is a A jailbreak mod in Cydia that prevents 3rd party apps from being deleted from the Home screen on your iPhone, iPad or iPod touch.
This tweak removes the "X" when uninstalling an iPhone app. Good for pranking your friends and preventing accidental app removal.
No Uninstall requires iOS 4 or higher (got that wrong in the video -- sorry!).
You can do this on a stock iPhone via the Restriction Settings, but if you're running an older version of the OS that doesn't support the app deletion restriction -- or you just want to have some fun at a friend's expense -- give No Uninstall a try.