Vendetta (2005)

From the introduction:

Imagine the world of Russ Meyer, mashed up with the nasty revenge horror of the late seventies. It is set in somewhere in the southern states of America, probably Texas, Arizona, Nevada or California. The characters are all young women, usually very foxy, large-breasted and wasp-waisted, but still by and large, independent and powerful. They are all friends, although there may be tensions within the group. One of them is The Girlfriend. She has a boyfriend who is a lowdown good-for-nothing punk. He's done something bad... real bad. And now our girls want revenge...