occa
In Aussie slang, occa means one ounce. Like, if you’re buying drugs, and you say 'I’ll take one occa,' you’re getting one ounce. Simple, easy, and very Australian.
"I need ten occas of weed to get through the day," said my friend after a bad night out."
"He just bought one occa of cocaine and now he’s talking to the walls."
"If you buy one occa of rum, you’re already halfway to being a legend."