Definitions by Gibberish123321

FBNL 

"Funny but not laughing".

Use this when something is funny... but just not funny enough when you are really laughing out loud.

Friend "Today a dorky 12 year old hit on me!! He invited me to the comic con!"
You "that's creepy fbnl!"

FBNL by Gibberish123321 July 26, 2009