Crook as Rookwood
KROOK as ROOK-wood · simile
Very sick. Crook means ill.
Person 1"Coming to work?"
Person 2"Can't, I'm crook as Rookwood."
You'll also hear
Crooksick, or broken, or dishonest Where it's from
Sydney slang. Rookwood is the city's huge old necropolis.

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While you're here
Sick. Also broken, or bad.
Extremely busy. Can be sarcastic about someone who isn't busy at all.
Extremely thirsty. Also used for weather that has not seen rain in months.
Completely full, usually after a big feed. Sometimes used for very drunk.
Showing off and very pleased with yourself.
Almost impossible to find.