The Floof-O-Meter is basically what StereoKitty said above. In order to give members "floofs," you need to have 25 posts or above to be able to "nuzzle" members to give them floofs. On how it goes up, someone must find your post amusing, helpful, anything positive or agree with and click on the "nuzzle" button right below the Floof-O-Meter status.