gun2 past tense and past participle gunned, present participle gunning
to be trying to find an opportunity to criticize or harm someone:
Why is he gunning for me?
to be trying very hard to obtain something:
He's gunning for your job.
3 [transitive] American English informalTTC
to make the engine of a car go very fast by pressing the accelerator very hard
gun somebody ↔ downphrasal verb
A policeman was gunned down as he left his house this morning.