An ailment that prevents the afflicted from attending work. Over a period of time the sufferer concocts increasingly unlikely stories of obscure medical complaints that keep them from work, whilst strangely maintaining their ability to participate in physical outdoor pursuits, like say mountaineering.
When contacting their workplace to report their absense, the sufferer often greatly embelishes the details of their complaint in order to raise plausibility, whilst ironically achieving the exact opposite.
Mary: "Did you notice Fred is sick again."
Tom: "Really? What's wrongwith him this time?"
Mary: "Nigelitis"
Tom: <shakes head>
Anything that a nigga would probably do. like after they score a touchdown they gotta do some crazy celebration. or putting huge rims on a car. anything nigga'd up. etc.etc.etc.