Okay, translations are in order for us Yanks ...

Bludger: lazy person, layabout, somebody who always relies on other people to do things or lend him things

Boomer: a large male kangaroo

Ridgy-didge: original, genuine

Amber fluid: beer

Skol (a beer): to drink a beer in a single draught without taking a breath

Bogan: person who takes little pride in his appearance, spends his days slacking and drinking beer