Definition
Extremely difficult to understand; very confusing or unclear.
让人蒙柧蒙
The report was written so unclearly, it was as clear as mud.
这份报告写得非常不清楚，简直让人一头雾水。
His explanation sounded like a bunch of gibberish, it was as clear as mud.
他的解释听起来像一堆胡言乱语，完全让人摸不着头脑。
The terms of this contract are as clear as mud; no one can understand them.
这份合约的条款让人一头雾水，没有人能理解。