Coined by Wendy Williams, a New York-based shock-jock/author, negroidian expenditures means to emphasize the apparent folly of certain purchases. The purchaser is not necessarily Black.
Look at him, iced out chain iced out teeth, 20 inch rims, such negroidian expenditures; he could've spent that on a house.
Any type of foolish, ridiculous or moronic behavior that results in the person described being shown in a negative light. Although the word carries the connotation of negative behavior carried out by a black person, this word can be used universally across all races, creeds and nationalities.
Did you hear about someone taking pictures of Whitney Houston in her casket at the wake?