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!
best sex friend best friend you have sex with
Alt night was great I hung out with my bsf ;)
BallSack Factor
The BallSack Factor is calculated by the difference in the height of your balls divided by the length of your lowest hanging ball. The difference of the balls is measured from the center point of the upper and lower ball. The length is determined by measuring the distance between the base of the ball sack to the lowest point of the ball sack.
BSF = Δballsack / ℓ ballsack
How is your BSF doing? Are you hitting double digits yet?
Almost! My BSF was around 9.7 this morning, what about yours?
No way bro! My BSF was only 0.5 :(
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!
july 5th ~ national post a good picture of ur bsf dayyy
1: “hey chicken butt,yk what td is??”
2: “uhh no sweet cheeks, what is it?”
1: “ NATIONAL POST UR BSF DAY”
Tis the season! Christmas is coming along and what better yet to do is a prank?! December 20th is Asking your Bestfriend to fuck and see their reaction, Have Fun!
Jack: “ Hey amber , bestie you wanna fuck?
Amber: “No ew that’s weird jack!”
Ask your bsf to fuck