Thick shake or thin? Why you ask? My friend here at work is from Australia and she told me she was going to McDonald to buy a thick shake. In Australia they call milk shakes, thick shakes. I just think it's so funny. She also informed me that they call cookies biscuits and biscuits are called scones. LOL ehehhe. I can't wait to visit Australia one day. My friend Liesel has the cutes Australia accent and she says the cutest things.