A person that seem like they fwu or care for you but are just around it because it benefits them or they see something they can benefit from. They can’t be trusted ! They are envious and have hidden agendas.
A seat snake is someone who snatches someone's seat when the original seat owner leaves to ex.) use the bathroom, get a drink, etc.
Person 1: Oh my god what a fun party. Its so fun, but I'm going to get another drink.
Person 2: Oh wow seat snake! *Snatches the person's seat.*
Person 1: Wow you are such a seat snake it's not even funny.