What's your point caller?
A question that is posed to a person who is telling a story or asking a question that makes no sense, or doesn't appear to have an ending. Does not specifically have to be used on the telephone.
So he was like driving, then his mum called, and she told him about the washing machine, and there was a huge tree in the park, and his brother was playing football
What's your point caller?
Oh, erm...
What's your point caller?
Oh, erm...