Australians call barbecues "barbies." Aussies eat grilled shrimp. In Australia, shrimp are nearly always called prawns, therefore "shrimp on the barbie" is humorous.
Bloomin' Onion is an American invention, like Outback Steakhouse, which was developed in Florida in the late 1980s.
According to Craft Beer & Brewing, Foster's pale yellow lager is not extremely popular in Australia, despite what the commercials say. The beer was first created by Americans who immigrated to Australia in the late 19th century.
Amazon's description: "Today, Marmite is a nutritious, black, savory spread that can be used in cookery. It comes in a black jar with a yellow top and is created from leftover brewer's yeast."
Australians love jam on toast and sandwiches. Jelly is a sweeter spread used in desserts.
An Australian website revealed an amusing Twitter thread about Outback Steakhouse's unusual dish. Toowoomba is a chain's seafood pasta and topping.
You won't impress Aussies by calling potato chips "crisps" Australians call them chips, while Brits call chips crisps and fries chips.