What is Chick-mate?
1.
1. Brit/Aus colloq. A female friend, a gal pal, etc, usually fairly attractive, that is part of your otherwise male 'crew' or
2. A girl you are friends with but, due to not being able to take the relationship further, reaffirm to yourself as only a friend and/or even outwardly advise as such to people who inquire as your relationship.
John: "Wow, that chick standing over there having a laugh with your mates is pretty hot. I guess you'd like to do her, eh?"
Jack: "Nah, she's a chick-mate. It'd be, y'know, like, doing one of the guys... yech!"
See