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.
When a person of a particular race emulate and/or have an obsession with black culture or people.
This term, along with negroidian expenditures were coined by Wendy Williams during her early 2000's NYC-based radio show, The Wendy Williams Experience.