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1.
A cultural term used by African Americans to describe the sleepy feeling that comes from eating too much food.
I've got the niggaitis and need to take a nap now.

Mama Duke's cooking always give niggaitis.
by Berry August 16, 2004
 
2.
Having a extremley full stomach and no energy to move.
I'm so full I don't feel like doing nothing but laying here, I think I have niggaitis.
by The1nonly April 04, 2013
 
3.
the characteristics, syndrome, or diagnosis of a nigga-- tardiness, stingyness, laziness, mooching, greediness, irresponsiblity, undependability, and falling asleep after eating. Similar to an illness.
The rap concert started late, cause Lil'Wayne was suffering from a bad case of nigga-i-tis
by treece December 22, 2005
 
4.
The syndrome that may afflict certain people after they smoke weed. Sometimes, after smoking, one will feel tired and lazy, only wanting to sit around and do nothing. This phenomenon has been associated with the stereotypical black person, or nigga. May also be referred to in conversation as

"the itis"
Guy 1: "Dude, I'm so stoned right now. I can't even get up off my ass."
Guy 2 (to friend): "Look at him bro- niggaitis strikes again!"
by stoner44 August 03, 2009