Also spelt Derro, is a term for an extremely lower class no hoper. Especially those into underage smoking, wearing DADA or Adidas, Listens to Eminem and a stoner.
Basically the whole population of Kempsey, N.S.W Australia
Short for Derelict.

Some sort of loser; a person amongst the dregs of society.

people that wear clothes such as dada or wu-tang. hardcore wannabes that listen to eminem, and are into underage smoking. almost always stoners. live in the shit part of any neighbour hood

A hobo, derelict or bogan. A person that is homeless or acts as if they are homeless, generally to be cool with other hobos.

As a short form of the word derelict, it has come to mean a great many things.
A dero can be described as someone who lacks hygiene… a life, friends, sometimes even a home. They often smell, due to the lack of hygiene. Then you get people that want to be deros, they listen to punk, or heavy metal music, wear black make-up, but can’t afford deodorant.

wannabe losers that think they are cool because they smoke and drink and hang out with other dero losers that dress like retards and think they are hardcore.

Those chat people who go to underage piss ups in parks.