yataktan kalkmış olmak; henüz yatmamış olmak: "He's never up before six. - Saat altıdan önce hiç yataktan kalkmaz."; "She's never up after ten at night. - Gece saat ondan önce yatar hep."
If someone or something is tied up, they are busy or being used, with the result that they are not available for anything else. He's tied up with his new book. He's working hard, you know