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Tony: Damn! you screwed Desiree last night!
Jim: FBNL man FBNL.
by DoubleTC September 17, 2010
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2
"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!"
by Gibberish123321 July 26, 2009
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