wouldn't shout if a shark bit him

A play on shout, which can mean either “to scream” or “to buy drinks”.

• "'Yeah, he's as silly as a two-bob watch. And mean. He wouldn't shout [buy a drink] if a shark bit him.' 'Too right, he's got snakes in his pockets. Anyhow, how's the punting?' 'No luck, mate.[…]'"
• "'Must be Martin's shout,' says one of them. The others roar with laughter. It's always Martin's shout but he's never there when you need him. 'Martin wouldn't shout if a shark bit him,' Harry explains to the tourist, filling up his glass."
• "Weasel was noted for the outlandish stories of his sexual and other exploits in Australia and the Philippines. No one believed him and he was generally considered a pain in the arse. To make matters worse he was known to have a "death adder" in his pocket. "Wouldn't shout if a shark bit him", was the general opinion."
• "He was a fat, balding, bad-tempered man, with a deserved reputation for stinginess. "Bastard wouldn't shout if a shark bit him," Dusty used to say, punning on "shout.""