美语中的Here's mud in your eyes！相当于：Good luck。举杯向朋友祝酒说声：Here's mud in your eyes!然后自己饮一口酒（或者bottoms up，干杯），祝他好运。

　　口语表现中的mud，无论作泥浆或污泥解，都无好运之意，因此朋友说：Here's mud in your eyes之成为Good luck，大概由于这句话说得稍快些，自然带出像是Good luck！的回响。Mud，一团污泥，看不到什么东西。美语中说的as clear as mud，像污泥一样清楚明白，正是说反话，有点讽刺意思。

　　一件事情，或者一个人说的话，你说你明白、了解；但是我不明白。于是我说：May be you understand it, but it's clear as mud to me。于是，你有再按你的了解向我解说，我还是不明白，说道：Thank you for your explanation。Now it's as clear as mud。这当然是说我还是不清楚了。

　　说人坏话，攻击某人，口语可作to throw mud（或者dirt）at somebody。西谚：Throw（或fling）mud enough and some will stick。亦作：It you throw mud enough, some of it will stick。攻击得多，会令人信以为真。

学习了

here's mud in your eyes..means good luck..

kinda hard to understand that way..

why use the phrase "as clear as mud"

when seeing mud,we must think mud is not clear..