BSF

A bsf means best friend usually, bsf can mean a best friend who is like a sibling to you or just a best friend

by Your_Dictionary April 15, 2019

Best sister/friends
When two best friends are so close that they consider themselves as sisters !

- Pauline and Catherine are really close!
- Yeah! They're BSF s :)

by foreveryounnng May 12, 2012

by Kiahhh February 24, 2018

How low do you hang?
Ball Sag Factor

How's the BSF today?

by FactRzerO August 2, 2003

"Bull Shit Foursome"
Four friends who often go out together on random crazy adventures and day trips.

Let's go out BSFing this weekend!

by Cindy5 January 24, 2009

The cliched phrase every guy tells to a girl when he wants her: Beautiful, Smart, and Funny.

Hey bro, did she say yes?
Nah, I did the BSF way too early

by Kukoo October 10, 2010

Someone who is a BOOB STARING FREAK. Usually straight guys.