National Bsf Day is on October 28 show off your bestie
"You busy the 28th?"
"Yes"
"Doing what?"

"Celebrating National Bsf Day you no bestfriend having ass hoe!"
by HitOrMiss69 October 27, 2019
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National Ugly best friend day is on May 11, on this day you spam your Bsf with ugly pictures of them.
Happy National Ugly Bsf Day Jenny!
by no name exe YT May 12, 2021
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January 16th is national girl bsf day y’all! Make sure to make your girl bestie happy on that day or otherwise she be depressed, so don’t let her down!
Aye brah, did you hear? It’s National girl bsf day! Go make yo girl bsf feel special :)
by NotoriousBigMike69 January 16, 2021
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You have to give your guy bsf all the attention all day even if you have a boy friend
by GOVERMENTOFFI August 28, 2021
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On March 17 u MUST fuck ur bsf of the opposite gender, this can lead u to fuck daily after that day
hi bsf it’s national fuck ur bsf day u wanna fuck?
hell yeah I wanna fuck lets go

*have sex and continue to have sex after that day*
National fuck your bsf day
by yeezius March 13, 2021
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You have to become bsf with one person
Go up and ask to be there bsf happy national bsf day
by Bsf4ever September 24, 2019
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“Are you busy on the 6?”
“Yeah”
“Doing what?”

“Celebrating national Bsf day , with your no having Bestfriend ass”
by freak man yeah thats me. November 1, 2021
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