Commonly expressed as the acronym:
RAC1) The visible outline of a girl's ass created when she wearing
leggings with either a long shirt or short dress/skirt that showcases
the bottoms of her cheeks where they meet the back of her thighs. Resulting in upside-down cleavage of the ass best appreciated when she's walking up stairs.
2) Summertime variation would include the same get up sans leggings and/or with
short-shorts.
Yo that girl
Erica had
quite the Reverse Ass Cleavage last night!