look up any word, like sex:
 
8.
When a guy receives a blowjob and cums so hard it hits him in his face.
Dude, I was getting this wicked BJ and I thought she was going to swallow, but she made me backfire.
by suchalamerequirement November 04, 2007
 
9.
to bring a result opposite to that which was planned or expected.
They never learn even after all the games they play continue to backfire on them.
by Goddess12* December 22, 2013
 
10.
Any variety of outdoor fire pit or fireplace located in a backyard. A backyard fireplace, i.e., backfire
Hey, stop by the store on your way over here and pick up some dang marshmallows... I'm starting up the backfire!
by crispernaki July 03, 2014
 
11.
This is when a guy ejaculates into a girls ass, followed by the girl blowing the load back onto the guy by farting.
Man, you wouldn't believe it last night I finally got to do anal to my girl but she totally backfired in my face, yep rough night.
by Hydro24 December 01, 2009
 
12.
When a guy cums so hard he ejaculates on his own face.
Dude, I thought she was going to swallow but she totes made me backfire!
by QueenLisa November 24, 2007
 
13.
when you are doing a girl (or guy if your just wierd) in the butt and she farts.
by hicke October 22, 2003
 
14.
When a friend is getting head and his girl/slut decides not to swallow and said friend busts in his face (accidental/on purpose). This act is compareable to spider man shooting his webbing in his eyes.
I think Kyle just did a backfire again.

Gee wiz I can not believe the call him Backfire.

I hope Ashley does not find out about my backfire incident.

He has an issue with the G-Spot, so he tends to backfire.
by Crippler8 February 24, 2008