General anger:
* "Ya fada" (He/She is angry)
* "Ya yi fushi" (He/She got angry)
* "Ya baci" (He/She is upset)
More extreme anger:
* "Ya yi haushi" (He/She is furious)
* "Ya yi zafi" (He/She is enraged)
Mental instability:
* "Ya yi shiru" (He/She is crazy)
* "Ya yi wauta" (He/She is foolish/stupid)
The best translation will depend on the specific context and the level of anger you want to express.