This question has been answered by multiple community members. See the first response.
[[+mml.pagetitle]]
[[+pagetitle]]
<title>[[+casino_longtitle]] - [[++site_name]]</title> <meta name="description" content="[[+casino_description]]">
[[+longtitle]]
[[+casino_longtitle]]
isa template-variable, then?[[+casino_longtitle]]
[[+longtitle]]
[[+casino_longtitle]]
[[+longtitle]]
[[+casino_longtitle]]
[[+casino_longtitle:default=`[[+longtitle]]`]]