Presumably, the term ‘jailbreaking an ipod’, means to gain access to areas of the phone, that perhaps, users are not recommended to tinker with. In other words to ‘hack’ into the phone. This, of course, may void any warranty coverage you have on the phone. It’s kinda like opening up your PC tower, and removing that little sticker that says ‘void if removed’. But, if you really want to, there are many programs/apps out there that will ‘hack’ your phone so you can download all of the cool apps/mods you want.