This is a girl who prevents her friend from hooking up with a guy. The female version of what we know as a "cock block".
Suzie and her hot guy are making out on the dance floor.
Girls friend: (while beginning to cry) Suzie, this break-up I am going through is so hard. I just need my girlfriends right now. Let's go.
Suzie's friend is a Twat Swatter