The curvature of a woman's breasts as they "blossom" out from a low cut shirt.
Low cut shirt + push up bra = Awesome Blossom
Low cut shirt + bustiere = Awesome Blossom
Low cut shirt + huge breasts = Awesome Blossom
Man, did you see the Awesome Blossoms on Jeniffer Love Hewitt and Pamela Anderson at Elton John's 2006 Oscar Party?
Paris Hilton ain't got no Awesome Blossom.
When a female is wearing an outfit that exposes the top of her cleavage, especially a tight outfit; when she walks, the cleavage wiggles or sways back and forth - noticed by males a mile away.
"Dude, check the wiggle-rack coming down the street. Ding-dong like a bell."