A girl who will break your heart over and over again without fail. She will be unforgettable. She will play with your feelings. This is the real definition. She will make you think that she loves you but she'll lie to your face over and over again and use you for attention.
You: gabby... i like you
Gabby: ohhh i like you toooo (no i dont)
You: omg really?
Gabby: yeahhh obviously (no im gonna cheat on you anyways.)