bestie

noun3

1. •
   (informal) A best friend.

   • You're supposed to be my bestie, Mel. We used to tell each other everything. So what's this Toby secret you can't tell me? — 2007
2. •
   (informal) A friend (any in general).
3. •
   (informal) A term of address for someone, usually used to instruct, to make a statement, or to draw attention.