NGGBF 

NGGBF is Non Gay Gay Best Friend. It is applied to a guy who is really good friends with a girl. He is such good friends you would think that he is the gay best friend, because he sleeps over. Although he is as straight as a whistle.

Hey Pablo, I'm Renee's NGGBF. or Hey Juan since your my nggbf come sleep over this saturday.

NGGBF by Pablo Nicks Randy Dime October 20, 2010

NQGBF

A Not-Quite-Gay-Best-Friend, like a GBF, only the person is not gay.

'What are you, her Gay Best Friend?'

'No, I'm not gay'

'Oh, so you're her NQGBF?'

NQGBF by sdfghjiwty November 10, 2012

NGBF 

Not Gay Best Friend.
A friend that everyone things is gay but isn't actually gay.

"Is Mike your GBF(gay best friend)?"
"No he's my NGBF."

NGBF by The5thman October 25, 2017

NGBFF 

Not goNot gonnna be best friends forever

This means you are bet friends but you don't think it'll last.

Sandy: I don't know about our friendship.
Mike: What do you mean?
Sandy: Well, we're definitely NGBFF.

NGBFF by born to ride x3 June 10, 2008