Don't be a coot
The story is told of one Anglican clergyman I had the privilege to meet on a few occasions. Being an ordained minister, from time to time someone who ask him to pray for them. I think the thought was that, because he was ordained, God would hear him. "Say one for me, Father", came the request.
Apparently he used to reply: "Say one yourself, you lazy coot".
I'm not sure quite why the coot gets it in the neck here. I wasn't aware that it was a reputably lazy bird.