To seek vengeance in an especially hostile or belligerent manner. This phrase is often used hyperbolically, although it can refer to physical violence. Primarily heard in US. I'd avoid the boss if I were you—he's thinks that blunder was your fault, so he's out for your scalp.I got robbed by some punk last night, and now my brother is after the kid's scalp.
to want to punish someone because you blame them for something bad that has happened The mayor has made one mistake too many and the voters are out for his scalp.