what accurately does var x:* meant actionscript?

its small machiavellian hunt 'var:*' since many hunt engines can't it.

i'm pristine accurately var:* means, compared contend var:object

i guess let me set erratic properties an vigilant :

var x:*  = myobject;
x.nonexistantproperty = "123";

but gives me an blunder :

property nonexistantproperty found x

what does * meant exactly?

edit: i bound uncanny var:* repremand var x:*. misplaced internet connection