This symbolises passion and hope burning within like a fire.

When a person is very passionate or hopeful towards something.
I'm so fire!
You're so fire!
George is so fire!
by Grey B April 29, 2022
To symbolise strength.

To compare a person to the strength of a burning fire.
She's / he's so fire
I'm so fire
by Grey B April 29, 2022
Meaning so hot, so beautiful , so pretty, basically what you call your friend on Instagram when she posts that fire selfie
Friend one: Girl u so fire

Friend two: thx boo kit I'm burnin' up
by Idkrandom June 23, 2015