What are some examples of passive/aggressive behavior?

I see this was asked 3 years ago, but most of the jellies who answered aren’t with us any more. :( So, let’s do it again!

My ex used to not answer a question I asked him or give any indication that he’d heard me, then, when I asked it again, he’d snap “I heard you the first time!”

Are the people who display this kind of behavior actually being wimpy chicken shits?