When a person walks by and silently tries to fart next to someone then suddenly shits themselves
Third time this week Bert cropdust backfired while playing a prank on Melvin
by muff-69-diver March 31, 2023
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if someone says bazinga and another person does whatever caused the first person to say bazinga better than they did.
adam - "i just snogged that way hot girl over there...bazinga!"
sam - "yeah, but i just tounged all her mates...bazinga backfire!"
by scottdastalker April 14, 2011
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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 6, 2004
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When you fart on someones pillow giving them pink eye.
I gave George a Detroit City Backfire, and now he has pink eye.
by Forgot-My-Name! September 21, 2010
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The expelling of gas from a human rectum after said rectum has been filled with air from their partners lungs. Usually performed while tossing salad. Discovered by Sam Mangum circa 1997 in Universal City, Texas. Known for not being a pleasurable experience. Also Known as a Bexar County Backblast or simply B.C.B.
I finally ate that bitches ass and she treated me to a Bexar County Backfire... funky ass bitch!

That Bexar County Backfire was delicious!

B.C.B. again bitch! You better not fart when I blow in yo' ass!
by SamJamesFriend February 25, 2010
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The horrid event that occurs when your woman craps in your bed after you pull out of her ass. The boulder toss part happens when you forcefully hurl the backfire at the rear of her cranium. Very nasty...
"Yeah man when I pulled out and she backfired on my new linens, I picked her fecal matter up and nailed her with it!"

"Wow man, the legendary backfire-boulder toss!"
by Hanzo Steel May 12, 2006
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The act of trying to fart while a penis is going into your butthole, and when put in with enough velocity the gas bubble makes its way up and you end up burping.
Greg: Man I shoved it in so quick last night right before he farted that it went up and she had the old San Francisco backfire.
by MidnightSquirrel August 1, 2018
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