Being Nig nogged is the same as using such slang terms as fucked, dicked over, or shafted. The only difference is when you are getting nig nogged a black person tends to cause what ever fucked you over.
While i visiting a local niggerville i parked my car and went off in search of the niglets who stole my sons bike i returned to see that my car had been nig nogged and was sitting on blocks
popularly used in online gaming and forums, it is a deroggetory way to describe the poor actions of another online user, describing his actions like those of black people
Random: DUDE i just pk'ed this noob on diablo 2 and stole his enigma!
Me: wtf is this nig noggery you faggot
My friend: Yeah wtf are you black?