The term 'Worst of the Worst' can be summarized by three crossword solutions: DREGS (5 letters), ROTTENEST (9 letters), and FROMHELL (8 letters). DREGS refers to the sediment at the bottom of a liquid, which is usually considered undesirable. ROTTENEST implies something that is in a state of decay or putrefaction, and is often used to describe something that is of very poor quality. Finally, FROMHELL is an expression that is used to describe something that is extremely unpleasant or difficult. All three words are used to describe something that is of the lowest quality or most extreme degree.