What Does BSF Mean?

BSF means "Best Friend" most of the time, but it can also mean "Best Sister Friend" or "But Seriously Folks." Here is a brief explanation of each meaning:
  • Best Friend. BSF is often used as shorthand for Best Friend. It is very similar to BF or terms like BEZZA , BEZZER, BEZZIE, and BESTY.
  • Best Sister Friend. BSF is also used to suggest a female friend is such a close friend, she is like a sister. (NB: BSF is not usually used for real sisters.)
  • But Seriously Folks. BSF is sometimes used to bring the conversation back to the point after a joke or banter.

Other Meanings for BSF

BSF has other meanings too:
  • Border Security Force
  • (The Border Security Force is the primary border defence organisation of India.)
  • Bible Study Fellowship
  • (Bible Study Fellowship is a fellowship offering a system of structured bible study.)
  • British Softball Federation
  • (The British Softball Federation is the national governing body of softball within the United Kingdom.)
  • Bolivares Fuerte
  • (BsF: Venezuelan currency)

Image for BSF

When I write BSF, I could mean this:

meaning of BSF BSF more commonly means "Best Friend."

Summary of Key Points

"Best Friend" is the most common definition for BSF on Snapchat, WhatsApp, Facebook, Twitter, Instagram, and TikTok.
Definition:Best Friend
1: Easy to guess
Typical Users:
Adults and Teenagers

Second Definition of BSF

"Best Sister Friend" is also a common definition for BSF.
Definition:Best Sister Friend
2: Quite easy to guess
Typical Users:
Adults and Teenagers

Third Definition of BSF

"But Seriously Folks" is another common definition for BSF.
Definition:But Seriously Folks
2: Quite easy to guess
Typical Users:
Adults and Teenagers

50 Ways to Say "Best Friend"

Here's a short video giving 50 ways to tell someone they're your best friend:


Examples of BSF in Sentences

Here are examples of BSF being used in conversations:
  • Jenny: You're my new BSF.
  • Nita: Hurray! Hang on, why now? What's changed?
  • (Here, BSF means "Best Friend.")
  • Leilah: We're going to party, party, party like no one has ever partied before!
  • Jane: Yay! BSF, has anyone booked a taxi?
  • (Here, BSF means "But Seriously Folks.")

An Academic Look at BSF

As it is pronounced using its individual letters (i.e., "Bee Ess Eff"), BSF is classified as an initialism abbreviation. Initialisms are different to acronyms, which are spoken like words.

Example of BSF Used in a Text


Help Us To Improve Cyber Definitions

  • Do you disagree with something on this page?
  • Did you spot a typo?
  • Do you know a slang term that we've missed?
Please tell us using this form.