Audrey: You don't know the half of it. I've led a terrible life. What does Audrey mean when she says 'You don't know the half of it.'?
1) Audrey is saying that the other person only knows a small part of her life and there is much more to her story.
2) Audrey is talking about cutting something in half.
3) Audrey is referring to a specific event in her life that was particularly difficult.
4) Audrey is trying to hide the true extent of her hardships.