informal A person’s best friend.
More example sentences
- Keira Knightley and Sienna Miller held hands like besties on the red carpet of the Independent Spirit Awards.
- We started at the Ritz, mostly to get a drink and because Rand and Hank are besties with a couple chicks that work there.
- They are all rich bitches who pretend to be my besties only because I am a model.
Definition of bestie in:
- The British & World English dictionary