Top definition
When you are best friends with one person to such an extreme that you feel like you are cheating on them if you hang out with anyone else. That friend is your other half and you love them so much that you cant think of anyone else who might make your day better. You are loyal to them without a fault and would marry them if you had the chance, but only as a permanent friendship and nothing romantic. You two complete eachother.
You will always be my bestie boo.
by sillypinkpanda May 26, 2016
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a person that’s your best friend but you also like them
me and james are bestie boo’s
by mysteriouslyhere March 24, 2019
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