I just started a job with all men and one of the men called someone a "bitch" yesterday.

After being unemployed for so long, I just started a new job. It's great yada yada. I love it. There's 12 people in my department at the office. 11 of them are men. I am the lone female. So far it's been okay. It's an IT department so honestly the masculine energy isn't exactly pulsating through the place. But the guys are all pretty comfortable with each other and ragging on people, specifically women. Yesterday, near the end of the day on a Friday (everyone was kind of letting loose), all of the men were complaining about our receptionist. She's an old fashioned older woman. I like her and put up with her quirks but some of the men were describing her with vitriol that disturbed me. One of them even said "yeah its cause shes such a BITCH". I thought that was really inappropriate. Am I going to be called a bitch behind me back if I ever have to stick up for myself? Or if I ever diverge from joking along with them and being "one of the guys"? This scared me, honestly. I'm just worried about working with all men and this isn't making me feel better.