When a vehicle has both black paint and black aftermarket wheels. The window tint should also be really dark and other aftermarket accessories such as black taillight covers etc. should aid in blacking out the ride.

When a car is completely modified and the color BLACK is the only color used throughout the entire vehicle

FLAT BLACK/Matte Black paint job/rims...headlights, tail lights, windows need to be blacked out as well, no gloss can be on the car....

Wearing/covered in black.
Applies to anything.

to spraypaint something, usually a vehicle, flat black. excluding lights, mirrors, and windows for obvious reasons, but including everything from rims to door pannels and trim logos

Special edition g-shock watch painted entirely flat black with a purple light. It appears to be completely "murdered out". Very popular amongst the homosexual crowd of G-shock users in miami florida.

to have murderized so much that it now seems boring and you don't want to do it anymore.