Origin
According to legend, this meme came into being when an anon desperately wanted a rump thread. A fellow anon found a photo of rapper Rich Boy (not Kanye West, more on that below) biting his lower lip and slapped the words Dat Ass on for good measure.
Spread
Google Trends search for “dat ass”
There is a clear spike in 2009.
Usage
This photo is used when a user would like a thread relating to a human posterier or “ass”. Notably a “bubble butt” thread. It can also be used to complementing a person’s (mostly a female’s) well shaped buttocks. Also words aren’t even necessary, emoticons for dat ass: :E, 8E, XE.
Picture Controversy
Here at Know Your Meme we like to keep our facts straight. The picture is not Kanye West, no matter how many times it is repeated. The man in the picture is rapper Rich Boy and the picture of him was taken on March 13 2007 when he was co-hosting MTV’s Total Request Live with rapper Ne-Yo in Times Square. Here are some more pictures for verification.
This is where it came from
Rich Boy with Ne-Yo
Mainstream Crossover
On January 16th, 2010, Sigourney Weaver referenced “Dat Ass” in a sketch on Saturday Night Live.
Excerpt (s.35 : ep.12)