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1.
To become uncharacteristically angered or agitated by something or somebody; to loose patience; loss of temper in a fashion not common to the individual's usual demeanor
"Martita made me so mad...Girl, I came outta my nigger bag and got all up in her face!
by Ken Laurel June 27, 2006
 
2.
A friend or somebody you know that never pays for anything and always mooches of

your shit. They have money but they choose not to use it. This word should

particularly used for these kind of people that always want to get smoked or

drank up for free. The root of the word is pretty self explanatory. The person

being called a Nigger Bag does not have to be Black!!!
God damn; that Nigger Bag Griffin smoked up all my Dank. Now i am broke as

shit
by burtonboarder October 11, 2009