A SLAP tear is a specific kind of injury to your shoulder.
To help make your shoulder more stable, there is a ring of firm tissue, called the labrum, around your shoulder socket. The labrum (say "LAY-brum") helps keep your arm bone in the shoulder socket.
SLAP stands for "superior labrum, anterior to posterior"—in other words, "the top part of the labrum, from the front to the back." It refers to the part of the labrum that is injured, or torn, in a SLAP injury.