A term of fondness for a character, most often from an anime, but the terms moved to other fandoms.
Some examples of how best boy/girl can be used.

Anime example: Omg!! Kirishima is best boy!!

Other fandom example: I think that Ginny from Harry Potter is best boy!!
by Kirishima! March 20, 2019
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Another name for Shey. She's the best baby anyone could ask for and she's so perfect. If you have her in your life, never let her go. You are so lucky to have someone so special in your life.
by KingNin May 15, 2019
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A song by our one and only goddess mitski that white people need to keep their hands off.
"I relate to your best American girl by mitski"
"Rebeca you're white you ARE the best American girl stop trying to be included in everything"
by justmark April 18, 2021
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A girl best friend will there for you no matter what. Even if you do something horrible they will be by your side. It’s someone you can trust, and be able to tell them everything and anything. Someone you want to tell something first before your girl friends or mom you want to tell them first to see how proud they are of you. A girl best friend isn’t just anyone it’s the person that tops everyone off, the girl that you want to watch series with and stay on call with all night the person you say goodnight and good morning to, the one who knows you better then anyone and knows your favorite food and favorite show she’s almost like your sister and you treat her like a princess. A girl best friend will give you advice about girls and tell you how to flirt and everything and she would love you no matter what
So what’s up with you and savannah? Oh she’s my girl best friend
by Sad hours August 6, 2018
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Girl bestfriend is the best person you'll meet in your life.She'll cuddle you like your a Big brother and protect you like your one too.She's the person who makes you smile,laugh and be yourself around the most!She would treat you like family and would be really proud of you no matter what you did she would text you in the morning and night and he would invite you around to her house all the time.You'd know her family and be comfortable around them,you'd drink tea and watch movies together whilst eating loads of junk food,then you would talk about everything and anything you ever knew and ever hoped and dreamed off.She would take you out to places and the cinemas and you could trust Her with anything!
That's My Girl Best friend But Nottingham My Girl Friend
by BIGG DADDY NATE February 13, 2018
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(noun) a girl best friend is the one special woman in your life you love, platonically.

She loves you like a brother, and doesn’t judge you for who you are.

She may have a small crush on you one time or another. You may have a small crush on her one time or another. This is completely normal.

Hug her, complement her, protect her, make her feel special, even if she isn’t your girlfriend.
She loves you, show her some love too.

She IS your best friend after all.
My girl best friend is the one person that will show me empathy when my guy friends won’t.
by ...bytemeh January 4, 2019
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The girl he told you not to worry about
Bf: Shes´s my girl best friend dont worry about her she has a bf
by Cumslut55 April 4, 2022
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