There's a new self-described "bitch" on the block!

Eddie Cibrian's ex-wife Brandi Glanville made her debut on "The Real Housewives of Beverly Hills" last night -- and her fangs are already out.

Brandi's entrance was harmless enough, hobbling into a charity event on crutches after a high-heel mishap. But the blonde immediately made a bad first impression on Lisa Vanderpump after it was revealed she was a friend of Cedric -- the house guest that badmouthed Lisa and Ken after they kicked him out.

It's pretty clear the women felt threatened but the hot, younger blood and reacted the best way they knew how: By trash talking her, "Mean Girs" style, from 5 ft. away. Get these ladies a Burn Book!

After the audible disses, Brandi warned "You get what you give in life. If you give you bitchniess, you get it back ... and I'm pretty good at being a bitch."

We can't wait to see more drama from Brandi. What do you think of the new cast addition?

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