ass smile
The smile formed by the bottom of a woman's ass cheeks. Must be a small tight ass to make a smile and not an ass grimace. Usually present on slender chicks.
I nearly starched myself after seeing her ass smile in those tight jeans.
Ass that Smiles
To be a great person who brings delight to the world.
Man, did you see that lady? She brings me so much joy. She's got an ass that smiles.