Galah/アホ
.galah Australian English A silly person or somebody who fools around. The term comes from a common pink bird closely related to the cockatoo and famous for its screeching calls and dances. 日本語 バカバカしいなことをやる人がこう呼ばれる。アホ。由来は、感高い鳴き声と踊りで有名なオウム科属鳥であるgalah(和名:モモイロインコ)のだ。 Plain English A goof, an idiot. Strine Dictionary

Strine is how Aussies pronounce Australian, and gives its name to the country’s unique brand of English.