Backfire

When extra gas accumulates in your tail pipe and the heat ignites it causing a small explosion resulting in snaps, crackles, pops, and sometimes flames.

"Dude it's backfiring!
"mY sUpRa BaCkFiReS sO iT mAkEs 800 hOrSePoWeR."

by Gapplebees June 13, 2023

beaver backfire

a queef so forceful that it scratches your ass crack

Did you hear that beaver backfire that Stacy let out earlier? It sounded like a chainsaw!

by Generous Tree April 30, 2025

Backfire

Similar to calling shotgun, but for the backseat instead of the front

"Shotgun!"
"Backfire!"

by @Hiphophead March 20, 2024