1 definition by Ashfern

A boy bsf is someone that will treat you like a sibling but less mean. They will bring you food and give you hugs and cuddle you but it’s all platonic. If you have a boy bsf you are lucky
Girl 1: bro last night Jake brought me ice cream because I was sad, he’s a real boy bsf

Girl 2: LUCKY!! I need a boy bsf
by Ashfern February 22, 2019
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