F.T.F.D.
When you're so clueless you could get lost in a kitchen and still not know what you're supposed to be doing.
He was told to answer the phone. He answered the door. F. T. F. D.
She was given a task. She did a cartwheel. F. T. F. D.
He was told to bring lunch. He brought a punch bag. F. T. F. D.