fire back
To quickly discharge or release something. A noun or pronoun can be used between "fire" and "back." "Yeah, but why is that my fault?" Sheila fired back defensively. After Sheila fired a defensive retort back, I decided to drop the subject.
fire (something) back (at someone or something)
to shoot back at someone or something. We fired about ten rounds back at them. The soldiers in the fort did not fire back at the attackers.
fire something back (to someone or something)
Fig. to send something back to someone or a group immediately. Look this over and fire it back to me immediately. Fire back all this stuff to the printer as soon as you have proofed it.