(as) clear as mud
US /əz klɪr əz mʌd/
UK /əz klɪr əz mʌd/

1.
langsung tidak jelas, sangat sukar difahami
very difficult to understand; not clear at all
:
•
His explanation of the new policy was as clear as mud.
Penjelasannya tentang dasar baharu itu langsung tidak jelas.
•
The instructions for assembling the furniture were as clear as mud, so I had to guess.
Arahan untuk memasang perabot itu langsung tidak jelas, jadi saya terpaksa meneka.