BSF

BSF: Butt Sex Friday's. A day of the week where you exclusive have butt sex/anal sex.

Kyle: what is BSF?
Josh: Butt Sex Friday's

Kyle: Oh, I love BSF!

by RagNasty November 1, 2020

BSF

best sex friend best friend you have sex with

Alt night was great I hung out with my bsf ;)

by Yhnhjk September 5, 2022

Bsf

Brown special friend

Aye your my brown special friend... bsf

by Patel56 May 26, 2019

the bsf combo

when 2-3 people like/liked you and they're all bestfriends (pronounced b-s-f, meaning: best friend).

person 1: "hey I heard that Jake and dave like you alongside with john!"

person 2: "looks like I got the bsf combo!

by ur.mom_ November 25, 2021

National bsf day

You have to become bsf with one person

Go up and ask to be there bsf happy national bsf day

by Bsf4ever September 23, 2019

Rogans BSF

Referring to Rogans Best Friend, particularly a freshmen that doesn’t like to take the blame for being Rogans sidekick. A fiend that likes to get pushed into lockers. (Rohan-Junior) ( fiendy freshmen)

Example: “Fiend(no name mentioned) why do you blame a junior(no name mentioned) for being Rogans BSF(best friend)

by PandaBoxer000_[ December 12, 2022

Bsf Forever

Some one whom I go to when I need help. Someone whom I go to for a laugh. Someone whom-is always by my side matter no what. Someone whom I care about the most and twill always the best. Someone who I can argue with and make back up the next day. I love you big head!!!💞🤞🏽

She is my “bsf forever”

by Jewel🔮 December 31, 2020