Multiple choice Directions: Complete the following simile. As ________ as dishwater. dismal blunt boring dull Reveal answer Fill a bubble to check yourself D Correct answer Explanation 'Dull as dishwater' is an idiom describing something boring, tedious, or uninteresting. Dishwater was traditionally seen as unexciting and murky. While 'boring' has similar meaning, the traditional idiom specifically uses 'dull'.