back-blast


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Noun1.back-blast - backfire from a recoilless weapon
backfire, blowback - the backward escape of gases and unburned gunpowder after a gun is fired
References in periodicals archive ?
You can also minimize back-blast by putting your gun muzzle up against or very close to the window before firing so that most of the gas and broken glass fragments flow away from you.
It shows debris from the bridge explosion hurtling toward the lens, a result of the dynamite on the concrete piers underneath the steel-supported roadbed creating a powerful back-blast.