Please help-Can I really get fired because of Facebook?

I made the comment on my facebook status ( just to blow off some heat) that I was looking for another job location whos managers knew more about fairness and ethics. Which i was refering to the district manager who cut my hours! well...... this girl im friends with on facebook, her mom is my supervisor and i didnt direct this message to her, i was talking about my boss... but she told her mom and now shes writting stuff on my wall about me going to get fired, and my supervisor treats me like crap now. I dont feel the need to explain becuase it was my facebook, my business, and i wasnt even talking about her. Could i get fired for this.... btw I dont plan on venting online anymore