In Australia, a 'drop kick' refers to someone who isn't very smart and hasn't made it very far in life. A drop kick usually doesn't go to school anymore, either having dropped out or done very poorly in Year 12, and is usually either unemployed or working a crappy low paid job full time (such as at McDonalds, KFC, supermarket etc), with no aspirations to do anything better with their lives. Many smoke and/or do drugs. Many drop kicks are eshays or bogans.
Drop kicks can be found hanging around train stations or bus interchanges, shopping centres and of course in low paid, unskilled jobs like fast food or supermarkets.
Guy 1: So, what happened to James? He dropped out of school before we graduated, what's he doing now?
Guy 2: Yeah, he's working at McDonalds full time. He's a total drop kick.