This is a really bad insult and it shouldn't be used anywhere. It's calling someone a pickme, ugly, wannabe, attention seeker and a bitch/dog. It's a very harsh thing and if somebody said it to me I would be crying. It's also anyway of the resting people to not come near them or they'll kill you, which is a little way too far. Its also used in some places as calling someone a fake friend who has never benefited they're life.
church hurt is where you experience a degree of distance, pain, or judgement from your church community. Essentially, you are just unable to “find your place”. This is prevalent in the Christian community, but can be extended to other religions.
Now that I am an adult I am beginning to heal from the church hurt that was inflicted on me as a child.