The term "basket case" is a slang term that is used to describe someone who is considered to be emotionally unstable or mentally ill, to the point where they are unable to function normally in their everyday life. The term is considered to be offensive and insensitive to people who may be struggling with mental health issues, and it is not recommended for professional or polite conversation.

Here are a few examples of how the term "basket case" might be used in sentences:

1. After the accident, he was a basket case and couldn't stop shaking for days.
2. The stress of the job has turned her into a basket case, and she's considering taking a leave of absence.
3. He was so nervous before the big game that he felt like a complete basket case.
4. The breakup left her feeling like a total basket case, and she struggled to move on for months afterwards.
5. The soldiers who returned from war were often seen as basket cases and were not given the support they needed to cope with their emotional trauma.