It feels like I shouldn’t be mad but I am?

My bf was showing me something on his phone and he got a message from “girls names from freak hoes” (a group name) so a few days ago he said his friend added her friends to the group and a couple of his guy friends were already in the group. I’m completely okay with the girl friend I already know but they named the group freak hoes... like that’s a little much. He told me about the girls that were added and they don’t seem like a threat but I’m just kind of uncomfortable. I’m not sure if I should be though