The term 'be fixated on' can be summarized as 'OBSESS'. This phrase is used to describe an intense focus on something, often to the point of obsession. It is usually used in a negative context, as it implies that the person is so focused on something that they are unable to think about anything else. The phrase 'WITH' is often used to indicate that the focus is on something specific. For example, someone might say 'I'm fixated on this project WITH my job'. This would mean that the person is so focused on the project that it is taking up all of their time and energy, and they are unable to focus on anything else related to their job.