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A car Backfires when gasoline is not completely burned in the combustion chamber, enters the exhaust and exploded through the tail pipe.

In forest fires, firefighters will light fires to burn toward the uncontrolled fire to take away the fuel and help control the fire (Called a Backfire).

Flip is correct, but also one when considering a ideal may use phrase "I'll put it on the backfire/burner until later", meaning they'll think about later, not now.

An explosion of prematurely ignited fuel or of unburned exhaust gases in an internal-combustion engine.The backward escape of gases or cartridge fragments when a gun is fired.A fire started in the path of an oncoming fire in order to deprive it of fuel and thereby control or extinguish it.

intr.v., -fired, -fir·ing, -fires.To explode in the manner of or make the sound of a backfire.To start or use a backfire in extinguishing or controlling a forest fire.To produce an unexpected, undesired result.

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Would you say when someone does you wrong, it backfire! what goes around come around!