Uptalk or 'High Rising Terminal'

So that's what that annoying girl-talk mannerism is called:

But the idea that vocal fads initiated by young women eventually make their way into the general vernacular is well established. Witness, for example, the spread of uptalk, or “high-rising terminal.”

Starting in America with the Valley Girls of the 1980s (after immigrating from Australia, evidently), uptalk became common among young women across the country by the 1990s.

Talk like that, and you are, like, a bonehead?