[MattAMiller]

What does "bling-bling" mean?

Jewelry. There's some disagreement over whether it refers to the sound of it bouncing off the wearer's chest or the cartton sound effect of it glinting in the sun. It can refer to wealth too instead of just jewelry.

[ChadGore]

"bling-bling" is the kinda thing that makes Homer Simpson go "OOoooo Shiney"(c)Homer, but has no real value. IE: A Benz hood ornamant worn around the neck of a poser. A BMW keychain caried by a guy who drives a Pacer. Diamond on hilary . . .you get the picture.

[Skywalk]

Guaranteed it's the cartoon sound. I remember it's first usage and it was more associated with the "shine" of jewelry, which in cartoons has that "bling" sound.

Actually it was just "bling" at first but the song that had the words "bling-bling" popularized that.