The process of befriending the best friend(s) of your best friend. Given the mutual common best friend, a relationship can easily be formed with your best friend's said best friend(s).
My best friend's friends came to visit this weekend. I instantly became best friends with them through the process of Osmosis Besties. We are now one group of real life Besties.
by KyFace September 28, 2009

Those Madan Gowri pundamavans who reacts heart to your girlfriends posts and comments "saataiyadi padhivu Dozhi" in all her posts just to get Bobs and Vagana pics on Snapchat when you guys are on a break.
"Kill that Boy Bestie before it lays eggs"
"Can i be your Boy Bestie and give captions for your profile pictures, Dozhi "
"Can i be your Boy Bestie and give captions for your profile pictures, Dozhi "
by grimrpr March 8, 2019

Man I don't know how much longer my relationship is gonna be able to last if she keeps dangling that bestie bait in front of me
by Heyheyheysmokeweedeveryday June 14, 2016

by dumisdum September 22, 2021

Automatic Best Friend.
When someone says something that really impresses or shocks you, so they become your best friend by default.
When someone says something that really impresses or shocks you, so they become your best friend by default.
by prissorsxrawks December 9, 2008

Some people measure friendship by the number if years they've known someone, others using the brownie point system. A new up-and-coming way of measuring friendship leave is bestie bucks. It is most commonly used in Northeastern US but is expected to gain traction as it moves out west and to our Canadian friends to the north. Synonymous with brownie points in some aspects but often used when a level of friendship has breached the "good friends" barrier entering the "bestie" or "BFFL" (best friends for life) territory.
Rachelle had recently beaten a difficult coop video game with Mike earning her a ton of bestie bucks.
Rachelle had been slacking in the trip planning department for a group of friends costing her valuable bestie bucks.
Rachelle had been slacking in the trip planning department for a group of friends costing her valuable bestie bucks.
by Mikeyps2 August 9, 2023

by LITTERLYCAL November 6, 2021
