No Great Shake is an idiom that means something is not very impressive or noteworthy. It is often used to describe a situation or event that is not particularly exciting or remarkable. The term can also be used to describe a person who is not particularly talented or skilled. The crossword solution for this term is 'TREMOR, ' which is a shaking or trembling movement of the body. Tremors are usually caused by muscle contractions, and can be a symptom of various medical conditions.