The breadcrumb is a means of getting back to previous pages without having to use your browsers back button. It is usefull on some websites where previous pages have expired and you cannot access them with the browsers back button.
the term breadcrumb is taken from the childrens story Hansel and Gretel in which the children dropped a trail of bread crumbs so that they could find their way back "home".
home > forum_category > forum > topic > reply ... etc.
//this link is for a php class for displaying a simple 'folder' breadcrumb on a website
Person 2: Fo real, cuz? That's straight crazy. Wee'z can go to WacArnolds and get a big bucket o' grease fries.