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Exposed skin on the "down under" side of the breast such as under an extremely short crop top.
The cheerleaders had super hot outfits that flashed Australian cleavage whenever they shook their pompoms over their heads.
by mandingoh May 26, 2006
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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2
Exposed skin on the "down under" side of the breast such as under an extremely short crop top.

The article was in the issue with Scarlett Johansson's Australian cleavage on the cover.
by Swinglow May 29, 2006
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