Butcher's
Sick. Short for butcher's hook, rhyming with crook.
Person 1"Kev coming?"
Person 2"Nah, he's feeling butcher's."
Where it's from
Rhyming slang: butcher's hook rhymes with crook. Butcher's hook for "look" is common in the UK, but this meaning is Australian.

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While you're here
A look. Usually shortened to "a butcher's". In older Australian slang, being "butcher's" also meant being crook (sick).
Extremely busy. Can be sarcastic about someone who isn't busy at all.
Extremely happy.
Get loud and rowdy, usually said of a party or a crowd. Also used for someone losing their temper.
Scare someone so badly they nearly wet themselves.
What's the story? What's happening, or what's the news?