Loading on the fly
What is this ?
Let's take an exmaple. Sometimes, you have an application that has modal window. Your user will not see it until he clicks on the button that show the modal. Then you don't need to load it before (that will just slow down the initialization of your application). So you will use loading on the fly or dynamic loading.
You will load what you need when you need it. Woozoo use this principe to load the module you need when you need it.