The term "unrealistic expectations" refers to beliefs or assumptions that are not based in reality, and therefore cannot be met. These expectations may stem from a variety of sources such as personal experiences, cultural norms, or media portrayals, but they often lead to disappointment when the actual outcomes do not match up with what was expected. Unrealistic expectations can cause frustration, stress, and even depression if one is constantly comparing their reality to an ideal that cannot be achieved. In relationships, unrealistic expectations can lead to conflicts and misunderstandings as individuals may feel let down by their partners who are unable to meet these standards. Overall, having realistic expectations about oneself and others is important for maintaining a healthy mindset and avoiding unnecessary disappointment.