A person that is so nervous about loosing their job that they will back stab and play on your fears to make themselves appear to be the superior worker. They will try and form alliances with others to back them up in their scheme as well as spread rumors and flat out lies. They appear jolly and happy and go out of their way to make jokes with the bosses but when you actually get to know the person they are more miserable then you could very imagine. They will try and start fights with you and then turn the situation around on you as if you were the bad guy.
Alice was so afraid of loosing her spot at the tin can company that she wagonered Joan (her friend) when lay-offs where about to come.
"Watch out don't get to close to Alice she might wagoner for your position"