Verb
gun it (third-person singular simple present guns it, present participle gunning it, simple past and past participle gunned it)
(informal) To accelerate or speed up quickly or suddenly.
You're going to have to gun it to pick up that much speed in such a short distance.
War can only be abolished through war, and in order to get rid of the gun it is necessary to take up the gun. Mao Zedong