Ok seeing as you have TWO threads and are finding it hard to google 
It's basically aggression disguised as passivity. Soooo....someone who never, ever gets angry, but winds everyone else up to the limit by not doing what they say they will, or losng things, or missing important dates.
For example, somene gives you their address on a piece of paper, when you hadn't asked for it, and you lose it immediately. (really you just didn't want it, but you can't confront the issue, you just have a mishap instead)
Or someone asks you where you are going, and you tell them (though really you don't want to tell them/haven't decided yet) and then go somewhere else.
It's kind of always avoiding direct conflict but screwing people over anyway, privately.
Then pretending you have no knowledge that the thing you have messed up was going to affect them.
So you've said you're going to the park with the kids, and they follow you to bring the child's coat which they forgot, but they aren't there.
It's that kind of thing. There are other elements as well.