I'm not gonna say the usual Australian slang like "fair dinkum" etc coz I neva use these words.
Expert - Somebody who is really good at a video game.
Expert (with a sarcastic tone of voice) - somebody who really sux @ a video game, but somehow does well in it.
Tosser - Loser (but I don't use this word much)
Truly - Means "really"? I learnt this when I was in Cairns
Goodo - Good
Root - To have sex
Shazza - Really Australian woman with an annoying whinging accent who has probably taken many drugs (Shazza is slang for Sharon).
Legit - Somebody who is not legitimite (sp?) E.g. You see this guy driving a Ferriari who is wearing thongs and a singlet.
Yobbo - Really Australian person (offensive term)
Skip - Another really Australian Person (offensive term)
Wog - European backgrounded Australian Person (offensive term). I'm a wog
Bogan - Australian person who is a loser
Derro - Same as above