I want to say that an individual has a chip on their shoulder, but a month ago, they did not.
- Did they "raise a chip on their shoulder", as might be inferred from the first cited history of the custom in Wikipedia?
- Did they "place a chip on their shoulder" as might be inferred from the North American fighting custom (Ibid.)?
- Did they grow a chip on their shoulder?
What verb can I use to explain the change? Can you cite any examples of this in literature or professionally-edited media (not personal blogs, but articles, books, TV, etc)?