It's a book that someone makes and gives to their best friend. This book is made up of everything that their best friend loves! Whoever this book is given to must keep I forever.
by Enimsaj May 16, 2017

In a friend group of four there is always two friends who tell their problems to the other two so the other two always help them with their problems. The Best best friends also like to ship them and do everything for them to be together.
by Alehandro1 March 16, 2022

X: Johnny got laid like 4 times yesterday.
Y: Yeah, I heard him and Jenny are friends with the best benefits
Y: Yeah, I heard him and Jenny are friends with the best benefits
by Clem Winkleberry May 1, 2014

by Rishabguptaji August 12, 2019

The term used to describe the synergy between Wolverine from the X-Men series and Akuma from the Street Fighter franchise in the crossover fighting game "Marvel vs Capcom 3: Fate of Two Worlds." This pairing is one of the most powerful pairings in the entire game, hence the name "best friends forever."
Man 1: Justin Wong is rockin' that She-hulk/Wolverine/Akuma team into finals!
Man 2: Man, it's the best friends forever. Too bad he's facing off against a Phoenix team; he should have used that Tron for the Level 3 grab and drill assist...
Man 2: Man, it's the best friends forever. Too bad he's facing off against a Phoenix team; he should have used that Tron for the Level 3 grab and drill assist...
by Sir Gootecks Ross, DDS September 10, 2011

person Dada ad person Sham are dating and person Sham and person Yaya are best friends,Dada and Yaya are now best-friend-in-law
by Millionaire Hippe May 13, 2011

heterosexual man, who is refered as "such a good listener" by his female friends, but never gets the opportunity to have sex with them.
She said to me "Why is my bf treating me like that ? If just all boys were as good as you". I am definitely her gay best friend.
by kaviarbionade April 21, 2010
