Symptoms: using words like "dawg", "n*gger", "word", "peace out"; wearing their pants far too low for their waist/showing their boxers or underwear; wearing du rags; relating events that happen to them on whether or not that would happen to a black person...
Note: Not all Caucasian people acting in this manner are suffering from black envy. Those who are suffering from it come from predominantly white, middle- to upper-class suburban neighborhoods.
The "opposite" of black envy is white envy where an African American who grew up in a "ghetto" or "inner city" lifestyle denies where they come from and attempts to pass themselves off as the stereotypical white suburbanite.
Person 2: No, dude, he grew up that way. He's just doing him.
Person 1: Carlton (from Fresh Prince of Bel-Air) is suffering from the opposite of black envy: white envy.
Person 2: No! Carlton grew up in a stereotypical predominantly white neighborhood. He's not suffering from white envy at all!
Person 1: Dawg, I got pulled over... and I'm not even black!
Person 2: You're suffering from black envy.