RewriteEngine on


RewriteCond %{HTTP_REFERER} ^http://(.*)?online(.*)?.(com|net|org|info|biz)$ [OR]
RewriteCond %{HTTP_REFERER} ^http://(.*)?poker(.*)?.(com|net|org|info|biz)$ [OR]
RewriteCond %{HTTP_REFERER} ^http://(.*)?viagra(.*)?.(com|net|org|info|biz)$ [OR]
RewriteCond %{HTTP_REFERER} ^http://(.*)?cialis(.*)?.(com|net|org|info|biz)$ [OR]
RewriteCond %{HTTP_REFERER} ^http://(.*)?phentermine(.*)?.(com|net|org|info|biz)$ [OR]
RewriteCond %{HTTP_REFERER} ^http://(.*)?mortgage(.*)?.(com|net|org|info|biz)$ [OR]
RewriteCond %{HTTP_REFERER} ^http://(.*)?casino(.*)?.(com|net|org|info|biz)$ [OR]
RewriteCond %{HTTP_REFERER} ^http://(.*)?gaming(.*)?.(com|net|org|info|biz)$ [OR]
RewriteCond %{HTTP_REFERER} ^http://(.*)?money(.*)?.(com|net|org|info|biz)$ [OR]
RewriteCond %{HTTP_REFERER} ^http://(.*)?gambling(.*)?.(com|net|org|info|biz)$ [OR]
RewriteCond %{HTTP_REFERER} ^http://(.*)?refinance(.*)?.(com|net|org|info|biz)$
RewriteRule .* - [F,L]