jumper
1. Australian/British etc. for Sweater.

2. Someone who commits suicide by jumping from a high place, normally a tall buiulding. Can be used to describe someone who is about to jump, or someone who already has.

3. A jump shot in basketball.

4. A girl who constantly changes partners.
1. "Looks cold outside. Better put on a jumper."

2. "Oh oh, looks like we have a jumper on the roof."

3. "Wow! Did you see that jumper from the free throw line?

4.  "Becky was with Micheal last week, now she's with Jason."