An insult normally directed at a fat girl wearing tight clothes aiming to make the most of her assets. This girl normally possesses the required saggy jelly tits in an undersized bra, saddle bag thighs, extra wide hips and a balloon belly gut, however her back tends to run directly into her upper thighs without so much as a ripple. Giving the impression that her lower body is the wrong way round.
This insult should be used carefully if the intended target is within earshot and of African descent as you will probably become the victim of a violent assault. Directing this insult at a Caucasoid female is a lot less dangerous as it may be taken as a compliment.
Other noted recivers of this insult are:
i)Skinny girls. Ususally wearing very big or string type belts in the hope of creating a feminine figure
ii)White guys. Who reputedly all have a flat ass, even the fat ones.
iii)Black guys. Displaying the opposite of the Arsenio Hall afliction
The scene: A club dance floor.. a DJ spins Baby Got Back and the more ample figured ladies stampede to the dance floor. Two friends who narrowly missed being trampled take refuge in the corner and watch.
Friend 1 turns to his buddy and observes "look at that flat assed hoochie mamma trying to shake what she doesn't have"