Bling Bling haha if you answered my skype call I'd have told you! hehe .
Ummm what do you call it when a word reflects the actions? Onomatopoeia?
Like in the original Batman tv programs? "THWACK!! POW!!!".
When light reflects from a highly reflective surface, say a diamond or some gold, the effect on the human eye is like "a bling" - so jewellery became "bling" (like sparkle) - "my bling" - then people would say, "it needs more bling" - "bling it up".
But it refers to displays which are, I think, somewhat crass.
There is wearing nice jewellery and there is walking around looking like a cheap Christmas tree, and funnily enough, Americans who are already known for replacing style and taste with larger amounts of things, coined the phrase.
It comes from black culture, hip hop / rap.
In linguistics terms, bling bling is an ideophone intended to evoke the "sound" of light hitting silver, platinum, or diamonds. It is not an onomatopoeia, because the act of jewelry shining does not make a sound. The form bling-bling is a case of reduplication.
There you go, that's the second thing you've taught me :)