VIDEO: Margot Robbie helps Americans decode Aussie slang

EVER had to explain what 'thong' means to an American? How about a fanny?

Australian goddess and beloved blonde Margot Robbie breaks out her trademark wit and sass with Vanity Fair in an effort to define 50 Australian slang words in less than four minutes.

She gives it a fair go too.

She talks fanny, tinnies, arvo, fair dinkum, and even doodle without too much effort.

Poor Robbie has to take a moment to understand Reg Grundies -- fair enough -- but is pretty emphatic when she tells the world what f---wit means.