Australian cleavage 

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.

Australian cleavage by mandingoh May 30, 2006

Australian cleavage 

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.

Australian cleavage by Swinglow June 1, 2006

australian cleavage 

butt cleavage - cleavage from the land down under

People of Wal-Mart is riddled with people with serious, world class australian cleavage

australian cleavage by Kelly-TBCRI December 3, 2010

Australian Cleavage Backstyle 

Accidentally exposing your tramp stamp/ass crack at an inopportune time.

Rob: "Did you see Mrs. Johnson today? She totally showed us some Australian Cleavage Backstyle when she bent down to pick up those papers."

Edward: "Yeah, it was totally hot. Who knew she had a tramp stamp?"

Australian Cleavage Backstyle by Lilyperks December 4, 2012