The Tigers are a clique on Whitechapel High. But not everyone can become a part of it. Only vampires , hybrids and werewolves can become a member. The clique was founded over 1,000 years ago, where the school first opened. Since then the Mikaelson family continues the clique and keep it alive.
The name "The Tigers" means that the members are strong and fighters, which are typical things in their specieses. It also means that the members are beasts of prey.