Dat ass

[Donald Trump]

A positive vernacular expression used when one sees the buttocks of another,
((usually in a pic posted on an internet board))
Expressing delight and a possible suggestion of sexual interest.

[Justin Bieber]

To see a female derriere and have the emotional response to bit the bottom lip while wearing expensive sunglasses.

[Mark Zuckerberg]

A meme where a pic of Rich Boy (Not Kanye West) is biting his lip and wearing expensive glasses.

Its Rich boy, not Kanye West.

[Britney]

When a person (Usually a male) sees a chicks ass that is so big/lusious/awesome/fappable.

To get the best quality, put on expensive sunglasses, bite your bottom lip, and say dat ass.

[Becky]

A statement used by men and women when they spot a voluptuous buttocks. A similar phrase that can also be used is [dat ass doe]!

[Britney]

Big juicy ass that bounces

[Little_Girl]

To be acknowledged that you have an ass; given a positive review of the ass; one showing affection for anothers ass; showing a friend that its Dat Ass he messed around with

[Rihanna]

A completly perfect booty.