::sniffle:: You don't trust me! Oh, I'm so proud of you!

It means, literally, "Don't make waves". The story that usually goes along with it refers to being nose-deep in cow poop...i.e., in a situation where if you make waves, you will be inundated with manure.

Then again, maybe they haven't heard the same Polish stories I have, so it wouldn't be funny. ;-) I just wondered.