1. A vulgar term which means the male penis and the female vagina; basically saying that the penis and vagina are best friends.

2. Your 'person' who will be there for you no matter what. Who shares their secrets, and laughs at your corny inside jokes and practically lives at your house. Who, if hurt by you, wil tell you to your face, and apologize if they hurt you. If they don't either you're wrong, or they're just not your best friend
guy: hey ya know, we're best friends in a way

girl: (thinks to herself: AH HELL NAH!)
in which way?

guy: because of our genitals! my penis is your vagina's best friend! they're the best friends, right?

girl: (thinks: OMIFRIGGINGOSH!)
by sunshiny-daytona July 23, 2009
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A best friend is someone who is there for you through thick and thin. It's someone who listens and understands you. Someone you can call anytime about anything you feel you need to 'tell' or 'vent'. It's someone who will stand up for you in the times when you need it most, keep your secrets close, and someone you can trust with your life. They will support you in any decision you make even if it's hard for them. It's someone who is there for you as much as they can be and does and says whatever they can to up your mood in down times. You can be your COMPLETE and total self around this person without feeling uncomfortable. You can say or do anything, and your relationship never changes. Someone who literally feels sent from heaven to make your life that much easier. Someone who will do almost anything for you as you would do for them, and someone who loves you no matter what kind of stupid things you do. This person will always want the best for you, as you will always want for them. And as much as people change- Your love with a REAL best friend will never fade through all the phases of life and problems that come a long with it.
When I go through hard times, there is only one person who is there for me no matter what and that actually makes me better, that's my best friend.
by CaliGirl07 December 25, 2011
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A best friend is someone you could not live without, always has your back and you can talk about anything to. Someone to keep your secrets and you can be yourself around.
Ali and Emily are best friends
by pandoraluther September 26, 2012
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Someone you trust completely.

Someone you pee your pants laughing with.
Someone you can look ugly around.
Someone who praises your burps.
Someone who can take you're stuff without asking.
Someone you find at your house before your home.
Someone your mother trusts.
Someone that pisses you off like no other.
Someone you love anyway.
Someone who helps by just being there.
Someone that can put you back together.
Someone who knows things about you that you don't even know.
Someone who you know will still be there after a fight.
Someone who completes you.
Someone that picks up on the second ring.
Someone you have planned your future with.
Someone that just knows.
Best Friend: Someone your thinking about right now
by Caramel Yum January 15, 2016
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A person who you can trust. Someone who will be there for you no matter what. Someone who cares about you. A best friend wont talk trash behind your back, wont lie to you or about you.
I love my best friend because i can always trust her to be there for me when i need a shoulder to cry on.
by ItsTheRealMe101 January 17, 2017
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A best friend is someone who you can trust and never let go. They are someone who will be by your side until your last breath. Having a best friend is the best gift you could ever ask for. They are the only person who understands you when you are down. You are always by there side no matter what! Even when you fight you always make up for it like 5 seconds after :) Just one secret... Never let them go they will always be there for you!
Girl 1: OMG! I have this bestie or if you want to say a best friend she is SO AMAZING!

Girl 2: Oh thats nice I wish I had a bestie.
by Watermelon 2.0 :) July 17, 2020
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