When a man ejaculates into a women and she queefs, backfiring the semen onto man.
Guy 1: "So Did You Get Her Pregnant?"
Guy 2: "Nah she Backfired Onto Me"
Guy 1: " Eww That's Gross!"
by LucusIV May 6, 2018
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also known as "backfiring"

The pool of cum left on your partner's back after you pull out and shoot your load.
"We were going hard doggie style, then I backfired all over her (or him)."

"I'm going to be backfiring all over that bitch tonight!"
by TheDarkPassenger January 21, 2010
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when a guy is at dinner and gets up to say goodbye, he stands up and reaches over the table to hug someone, and he inadvertently places his cannon within one inch of someone (who is still sitting down) at the table's face. the backfire-ee, if you will, then sharply turns their head not knowing their is a cannon pointed right at their face, and then proceeds to make full blown facial contact with the shaft and the ballbag of the backfire-er
1) holy shit man, that one time at the house of blues, i was giving my girl a hug goodbye, and i totally gave ginnie mae the backfire

2)
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Verb; An attempt to fix something in which the fixing actually makes the situation worse for you. Common on the internet when an arguement "backfires" and makes you look stupid.

nub 1:My mom is not FAT! See! *insert link*

person 2: Dude! She totally is, your arguement totally backfired on you. Lol, dumbass.
by CommandoDude March 14, 2008
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The moment where, when you're taking a shit, a large pocket of gas (referred to as a future-fart) that was resting mid-shit or between two shits escapes as you're passing your lovelog, resulting in a sudden violent fart than not only propels your previously freefalling turd at Mach 2 speeds, but also results in a pleasing shotgun blast of turdlings across the toilet bowl.

A backfire is so named for it's similarity to a car backfiring.
"Man, I was taking a dump and backfired, and now I get 'Nam flashbacks when I visit the shitter."
by TheTurdBurglar December 28, 2013
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The sound your vehicle makes when you drive a Ford
Hey, did you hear that car backfired, sounded like a shotgun?
Ya must of been a Ford
by Hambone008 June 4, 2017
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When you're about to fart, and something extra (and usually liquid) explodes out of the ass.
I was going to light my fart on fire at the party, but a few seconds later everyone got hit by my backfire.
by Smackdown Lane June 20, 2006
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