Deal - With - A - Nigga. Often used as an abbreviation for the phrase "I ain't trying to Deal With A Nigga.", which refers to an individual who does not want to put up with an African American for any variation of shortcomings or mistakes made by said African American.
"I went to Mcdonald's and told them specifically not to put pickles on my burger, and you'll never guess what I found on my burger. Pickles. I told the guy at the drive-thru, I ain't tryin' to deal with a nigga. D.W.A.N.!"