Misfire

Misfire may refer to:
 * Misfire (Transformers), the Transformers character
 * Misfire (film), a 2014 American action film
 * "Misfire" (That '70s Show), an episode from That '70s Show
 * An engine misfire, see engine knocking
 * A song on Queen's album Sheer Heart Attack
 * A malfunctioned cartridge that fails to discharge at all (dud), doesn't discharge promptly (hang fire), or only partially discharges (squib load) when being shot from a firearm.
 * A muzzleloader that does not fire when the trigger is squeezed.