Silly word in Zen comment

Hi,

I'm interesting to explore the Zen code, and I was surprised when I saw in the comment the word Silly :

  // If the user is silly and enables Zen as the theme, add some styles.
  if ($GLOBALS['theme'] == 'zen') {
    include_once './' . $variables['path_to_zen'] . '/zen-internals/template.zen.inc';
    _zen_preprocess_html($variables, $hook);
  }

Do I understand the Word Silly as I understand or there are other meanings !

Regards
Baher