ばかばか馬鹿馬鹿bakabakaしいshiiバカバカしいbakabakashii
1.

Reflecting an extreme level of absurdity or nonsense, often evoking a sense of disbelief or incredulity towards a situation or statement.

2.

Characterized by a lack of practical value or significance, making it seem like a waste of time or attention to engage with.

3.

Describing an action or event that is far beyond what is typically expected or reasonable, often resulting in a sense of incredulity regarding its necessity or appropriateness.

Example:

ばかばかしいとしか言いようがない。