What is called a jump tap in Android documentation?

I was looking through ViewConfiguration class documentation and I found getJumpTapTimeout() method. Description says it is used to determine whether user wants to perform a "jump" tap or a regular one. The user has to complete jump tap within this time or it will be a regular one. The question is what is this jump tap anyway?

I've looked through the source, but it doesn't give any clues. Jump tap timeout is 500 ms, so is the long press timeout. So if I keep my finger for more than 500 ms on the same spot without moving, this is a long press, and it's not a tap. Tap timeout is 115 ms, so I have to at least not move my finger for this time or this won't be a tap. But then I have to do something until my 500 ms expire. Only what exactly?