aussie slang for "can of beer".

could also mean "cylindrical liquid holder full of urine"... but highly improbable.

In-depth definition, PART TWO:
Charvae are distinct in physicality even when naked, because of their lank, gaunt, slight appearance and the look of borrowed flesh, hanging slightly loose from their bones due to their peculiar dietary habits, which lead to acute malnourishment. This gives their skin a kind of thin, translucent quality and what charvae might think of as their six-pack is actually their lower rib-cage, lending them a particularly whippet-like form. Charvae posture while clothed is still conspicuous and features numerous defects - bandy legs, bent backs and an ugly asymmetric swagger when in motion, due to one hand of the male being down their shell-suit bottoms and the hands of the female constantly pulling theirs up. The charva food-cupboard that sustains these frail bodies
comprises tinned hot-dogs, baked beans, pasta'n'sauce (for the posher ones) and may even stretch to a packet of dairylea, all bought in mountainous bulk on giro day from Netto (or maybe Morrisons if they're walking home). The charva attitude to food seems to be 'if it doesn't come in a tin, its bad for you', while fresh vegetables and fruit are considered to be 'for nonces'. White cider is the chosen beverage, which is taken several times a day at intervals, with class B drugs for added interest. Celebratory splash-out meals are had from time to time, when charvae 'get raj' at McDonalds then get mortal drunk on a fine wine, such as Lambrini, at about 2 o'clock in the afternoon. This is...