Malika, lol.
Homecoming is when the high school's football team plays a special game and there is a bonfire, parade, and finally a dance in honor of the team. It is a really big deal.
This is Jumper's homecoming. She wouldn't go to J's homecoming because his parents (within his small town) have told everybody that she is a tramp. She didn't feel comfortable going there. Because she wouldn't go, he didn't go either. Well, he had to go for a while because he was voted on the homecoming court, but after the homecoming king and queen were announced (he didnt' win and hadn't even wanted to be on the court), he went straight home. His parents were furious, but he didn't want to go with a different girl or by himself.