Australian Slang Guide
quid, as in not the full quid. Anyone who's not the full quid is mentally deficient.
Quist, as in Adrian Quist.Rhyming slang for drunk. Quist = pissed.
rack off. Go away, get lost.
ratbag. Rascal, rogue. Also someone of eccentric or nonconforming ideas or behavior, or someone whose preoccupation with a particular theory or belief is considered obsessive.
reckon. Very commonly used for think. By itself in reply to a question, it means I suppose so.
ripper. Great, terrific; something terrific.
rock up. Show up or walk up, approach.
roo. Also 'roo. Kangaroo.