Aussie yum cha is when you take the random shit out of the freezer and chuck enough of it in the oven to make a meal. Can include: pies, sausage rolls, nuggs, spring rolls, dim sims, hot chips. Whatever is laying around in the freezer, and can go in the oven.
'Hey mum, what's for dinner tonight?'
'Aussie yum cha, brah'