the person you can count on to be there, at 3am. the one person you can know will never try to take your man. the one that will never betray you.
the person that can order your coffee perfectly, knows what you are talking about when you make no sense. the person that can tell on the phone if the sex was good or not by the way you talk.
bestfriend: (to you) so, it sucks that it happened that way, but he wasn't that good, and you can definitely do better... remember that guy from the bar saturday that was checkin you out? lets go see if he is there this weekend!
2 Girl best friends: They do all the girly things together, no one says anything.
2 Boy best friends: They do all the boy stuff together, no one says anything.
1 Boy + 1 Girl best friends: They do boy and girl stuff, People says lots of stuff
Gun Man: I’m going to kill your best friend miss
Stu: No take me instead!
Your real, true best friend is your comfort zone.
In some cases, the two or more part doesn't apply. It is quite possible to be your own best friend.
You have ''in'' jokes that no one else can get, but you still find as funny as ever =) You don't have to pretend around them, they like you for who you are.