when a girl puts that delightful arch in her back, and sticks
her ass out in a erotic/sexually suggestive manor, often accompanied
by a "booty dance", that brings shear delight
to the males species.
"did you see her back that ass up, playboy? it almost brought a tear
to me eye, and a 2x4 to my pants!"
"did you see lucy liu bending over in the drive-thru scene
in charlies angels?? ddaaaaaaaaamn, it was delightful! that the essence of female perfection!"