Switchblade Sisters (1975)

The "Dagger Debs" are a gang of snarling girls, and Maggie is their newest member. Lace, the ever-teeth-gritting leader, befriends her but soon has doubts; it seems Lace's man, Dominic, head of the "Silver Daggers" fancies the new recruit. Lace struggles to keep control of the Debs and a handle on Nick as they face off against the rival gang of pushers led by Crabs.