Similar to a (Sig Alert). A Nig Alert is a warning to the public that members of the African American community are upset over a court ruling or a jury decison in a court case that they do not agree with, thus prompting them to demonstrate or cause civil unrest.
The jury just came back with a not guilty verdict on that white deputy that was charged with roughing up the black gangbanger, someone better issue a Nig Alert.
A male of middle eastern decent who does not bathe or use deoderant frequently that will typically wear disco type shirts made up of nylon or rayon with the top buttons unbuttoned. The type of fabric harbors the bacteria and body odor which makes the person and wearer quite pungent and aromatic.
Lets get out of this disco, the stink shirts are here.