Chicks before Pricks
The female version of Bros before Hoes. Equal in meaning. Putting your female friends before your booty calls/bfs/exes etc.

There is also Chicks before Dicks, but this sounds better.
Jannett's Ex bf: Hey Jan, you wanna get together tonight?
Jannett: Hell no, I got a girls night out tonight. Chicks before Pricks.