The crossword solutions for the term BACKBREAKER PROVERBIAL are 'STRAW', which is a five-letter word. The phrase 'a STRAW that broke the camel's back' is a proverbial expression used to describe a situation in which a small additional burden causes a collapse or breakdown. This phrase is derived from an ancient proverb, which states that a single STRAW can be enough to break a camel's back if it is already loaded with too much weight. The phrase is used to refer to a situation in which a person or thing is already under a great deal of stress and a seemingly small additional burden causes them to collapse or break down.