One who jumps at the thought of catching jizz. Usually you would call a girl this if she's a WELL known smut around your school/neighborhood.
1.Yo did you see that jizz jumper look over when you said dick? That trick needs to simmer down thats my nickname.
2.Dat bitch needs to give me my money, out there trickin' on the corner all day and cant pay a pimp, dirty ass jizz jumper.