Inf. I have no explanation or excuse. What do you expect me to say? (See also What do you want me to say?) Bill: Why on earth did you lose that big order? Sally: What can I say? I'm sorry! Bob: You're going to have to act more aggressive if you want to make sales. You're just too timid. Tom: What can I say? I am what I am.
interj. I’m speechless.; I can’t explain.; What more can I say?; What do you want me to say?; I’m speechless. So, I dented your car. I’m sorry. What can I say?