Basically the word Niger, but spelt in a way that soyboys feel isn't offending anyone.
The word is spelt with a gh to make the "aih" sound, and the J is to replace the G, which makes the word similar to a derogatory term against black people.
Ex. 1: The country of Nighjer borders the country of Chad.
Ex. 2: Shut up you stupid nighjer! *proceeds to be beaten up by gang members*
When one has been up for so long and has had such little sleep that one simply becomes, “retarted”, and does or says things that would be considered to be completely out of pocket due to the lack of sleep.