A "Bussdown" isn't just any diamond watch; it specifically refers to "aftermarket" customization. The original factory bezel and face are removed ("busted down") and replaced with a pavé setting of diamonds.
: Refers to a sleek, middle-part hairstyle (usually very long and straight) that is styled with "confident, powerful, and stylish" precision.
The term has been cemented in the public consciousness through several high-profile hip-hop tracks:
: Perhaps the most famous use, where Blueface contrasts his past ("Used to ride the bus down") with his current wealth ("Now I wear a bussdown").