An occurance involing an individual of
negro, or miscegenated, heritage vanishing at a time in which something needs to be
done or witnessed(by the nigger not present). Often
confused with Slack Ass, occurances are usually symptomatic of Nigger Mortis.
Tyrone pulled a Nigger Disappear for the results of Shanika's, LaQueefa's, Yolanda's,
Ja'
Mika's and De Shawna's paternity tests.