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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 24, 2010
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