Definition A BFF is a term for someone's best friend or close friend and is characterized by permanence, irrespective of the number of times the meaning of friendship has been changed in their lives. [1] BFFs are usually in close contact and have shared experiences, such as attending the same school or sharing musical tastes.
Bff is an initialism of the phrase best friend (s) forever, and it’s a term of endearment used for selected close friends. It’s been in use since at least 1996, although the concept of having a “best friend” predates the phrase. Bff is mostly used by younger people in informal communication.