What is I.n.s.?
1.
Inferior Negroid Syndrome. This term only applies to African Americans. A group or single black person who behaves in an ignorant and stereotypical african american way.
"Did you see that guy in Taco Bell? He had a severe case of I.N.S."
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1.
An asshole in a beat up car trying race you on the highway.
"Breaker breaker 1-9, this is Brown Fog, I got a gat dang ragglebilly ..