Is this behavior ADHD or being a Jerk?

When my husband doesn't take his meds (which is most weekends or any day he doesn't have to go to work), he is constantly harping on everyone about things we didn't do, picking at the kids, physically bugging them like tapping their shoulder over and over just to get a rise, etc.  Every single question I ask is met with a question in return.  For example, "Are you mad at me about something?"  His reply: "Should I be mad at you about something?"  If I ask him how to do something like get a computer program to work, his reply is "Well how do you think you would do it?"  Is this just something I'm blowing out of proportion, is it an ADHD trait (along the lines of provoking conflict), or just him being a butthead?