The term 'Signal of Disdain' can be summarized by the crossword solution 'SHRUG' (5 letters). A SHRUG is a gesture used to express a lack of knowledge, indifference, or disagreement. It is often accompanied by a slight raising of the shoulders and a slight lowering of the eyebrows. It is a universal sign of disdain and can be used to indicate that someone does not care about a particular situation or opinion.