gun for
1. • gun for (someone)
to look hard for a chance to harm or defeat someone
My supervisor has been gunning for me for a long time and I do not know why.

2. • gun for (something)
to try very hard to get a prize or promotion etc.
I have been gunning for the sales job for a long time.

[TahlilGaran] English Idioms Dictionary ▲

gun for something
• gun for (something)
to try very hard to get a prize or promotion etc.
I have been gunning for the sales job for a long time.

[TahlilGaran] English Idioms Dictionary ▲

gun for
v., informal
1. To hunt for with a gun; look hard for a chance to harm or defeat.
The cowboy is gunning for the man who stole his horse.
Bob is gunning for me because I got a higher mark than he did.
2. To try very hard to get.
The man is gunning for first prize in the golf tournament.

[TahlilGaran] English Idioms Dictionary ▲

gun for someone
• gun for (someone)
to look hard for a chance to harm or defeat someone
My supervisor has been gunning for me for a long time and I do not know why.

[TahlilGaran] English Idioms Dictionary ▲