Here are some more respectful alternatives, depending on the context:
Formal:
* Person with a mental illness: This is the most respectful and accurate way to refer to someone with a mental health condition.
* Individual with a mental health diagnosis: This is another formal way to describe someone with a mental health condition.
Informal:
* Crazy (can be used playfully or seriously, but it's important to be mindful of the tone)
* Weird (can be used in a lighthearted way)
* Eccentric (suggests someone with unusual or quirky behavior)
* Off-the-wall (implies someone is unpredictable or outlandish)
Ultimately, the best word to use depends on the specific situation and the intended meaning.
Remember: It's important to avoid using language that perpetuates stigma and stereotypes around mental illness.