DISAPPROVAL SHOW is a term used to describe the various ways people express disapproval. The crossword solutions for this term are FROWN (5 letters), BOO (3 letters), HISS (4 letters), and RAVE (4 letters). Frowning is a facial expression of displeasure, while booing is a vocal expression of disapproval. Hissing is another vocal expression of disapproval, usually made with a sharp intake of breath. Raving is an intense expression of disapproval, often accompanied by loud shouting.