Re: 'Meh'
Not clicks, but the sound of putting tongue on palate then pulling it away. That is certainly the origin of 'tsk' and 'tut'.
I thank you for the informative post, but I think you misunderstood mine, we do not have a word equivalent to 'tsk' or 'tut', as far as they attempt to reflect that sound of disapproval.
Was only saying that US 'meh' is probably from Japanese, much the same word has much the same meaning, and is by far the older.