Backfire

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 June 2, 2018

loose backie

a badly maintained and managed female bikini line.

She was fine apart from the loose backie hanging out of her pants

by sendoola August 25, 2007

Backfilling

Person 1 lays on back, pulling knees to chest, making an impromptu toilet. Person 2 then sits on "toilet", shits into person 1's ass. Person 2 "back fills" person 1.

Once Bill assumed the position, Marc began backfilling him.

by Eggfarticus May 24, 2017

Bulgarian Backfire

A bulgarian backfire is a Halo 2 term. It is when a player tried to stick another player with a plasma grenade from point blank range, and the plasma bounces off the player and sticks to the person who threw the grenade.

"D00d! Sum n00b stuk m3 wi7h a Bulgarian Backfire last night on Xb0x Live!!!!11!!!11 I wuz s00 pissx0r3d!!!111!!1!1

by Led Zelda December 5, 2004

Backfield in motion

A sex partner that moves around instead of being a passive recipient during coitus.

The young electrician enjoyed sexy and made sure the backfield in motion at the Gloryhole !

by Angry Stockholder February 2, 2020

Backfire on Her Tongue

When a girl is licking your ass and you slide out a small amount of poo.

When Roxy was licking my ass the other night I couldn't resist to squeeze a little one out.

I ended up doing a backfire on her tongue.

by Mazzbot January 25, 2012

Backfire

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