Hello!
This feature is not implemented. Here is a quick tweak: edit [Joomla dir]\components\com_hotornot\controller.php and append to the "__construct" function the following:
$active = JFactory::getApplication()->getMenu()->getActive();
if ($active) {
$document = JFactory::getDocument();
if ($active->params->get('menu-meta_keywords')) {
$document->setMetadata('keywords', $active->params->get('menu-meta_keywords'));
}
if ($active->params->get('menu-meta_description')) {
$document->setDescription($active->params->get('menu-meta_description'));
}
}