What is I'm on fire?

An exclamation used to inform one's friends that you've just had sex. It's also something you don't shout to a girl when you cum.

Person one: "Dude, I'm firing my laser!"

Person two: "Well done mate, well done!"

I'm on fire - video

person 1: FUCK I'M ON FIRE AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
person 2: (calls police)

a phrase that can be used in two ways

1). If you're on a winning roll in a game

2). You're literally on fire

1). Got on a winning streak on poker i'm on fire tonight lad

2). HELP! somebody help. I'M ON FIRE!!!