There are no dumb questions, only dumb answers.
There's a good explanation on this site:
http://www.fido.asic.gov.au/fido/fido.nsf/byheadline/Short+selling+-+what+is+it+anyway%3F?openDocument
and short sales reports from the ASX can be found at:
https://www.asxonline.com/intradoc-cgi/idcplg?IdcService=ASX_COLLECTION_DISPLAY&hasCollectionID=true&dCollectionID=68&SortField=dInDate&SortOrder=Desc
I hope that's not a dumb answer.