Cassie: I'm a Columbine Kid. It's a tag they now give to kids who have lived through school shootings.
According to various urban dictionaries, a Columbine Kid is a kid who has the potential to become a school shooter, not a victim.
Columbine refers The Columbine High School massacre which rook place on April 20, 1999, near Denver and Littleton, Colorado. Two senior students, Eric Harris and Dylan Klebold, killed 12 students and 1 teacher before committing suicide.