A very short dictionary of Australian slang - part 4

cool = Describes something very fashionable, up to the minute. Can also signal approval/agreement. A. Is that OK? B. Cool.
unreal, ace, sweet = Describes something highly enjoyable/attractive. It was an ace film.
slack = Describes someone who is lazy. He’s incredibly slack.
suss = Short for suspicious. Describes something not reliable, or questionable in value. I think the whole idea’s a bit suss.