To be mad chill yo ...
As MIMS would say:

Hold up,
Look up in the sky,
It's a bird
It's a plane
No it's me
Cuz I'm fly, I'm fly I'm fly I'm fly
by Gangsta Fil May 2, 2007
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When something mad or funny happens, a alternative to saying 'I'm dead', as to not go to hell and wish things upon yourself
Mate did you see imjustbait recent?

Ah man I'm flyinggggg
by mickky May 3, 2017
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The rapper way of saying that you are way cool
I'm so fly chicks wanna bang me when I drive by
by Kendall February 26, 2005
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