To which a non australian has a large obsession with Australia moving their choice of words to an oversized amount of Aussie slang. The word is brought from the terms "koreaboo" and "weeaboo". An "aussieboo " is found using terms such as 'g'day mate', 'I'll throw a shrimp on the barbie', etc.
Ex 1 .
Non Australian : "G 'day mate " *does Aussie hand gestures *
Australian: Omg,, they're such an aussieboo
Ex 2.
"Omg, did you see hyunjin from stray kids yelling AUSSIE "
Yeah,, he's such an aussieboo
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.