A person who seems like a really nice person and you can confide in, but is actually backstabber waiting for the moment to strike. However, if you are on the other end it, it is the best kind of petty that leaves a deeper emotional scare than just being openly petty.
Friend 1: Lily just told me everything about what she has done behind her bf's back and I literally sent them to him. She shouldn't have tried to take my man.
Friend 2: You are such a snake, but yas queen