I used to have what I call "chronic pissiness", and I've noticed that a lot of BP people seem/seemed to have the same issue, but I'm not sure if it's BP related or not. That's just me noticing a trend.

I know that short temper is a symptom of ADHD, a disorder that I do have, but treatment (therapy and medication) have helped me a lot in that regard.

IMO, try to focus on treating the symptoms instead of tying to pin the symptoms down on a disorder.

I know that Lamictal has helped me a lot with my chronic pissiness. Something about a mood stabilizer seems to have helped. But also, being able to talk it out in therapy is great too!

Good luck