Catcall outcry, also known as whistle-blower, jeering or hooting, refers to a form of vocal disapproval often expressed by a crowd towards an individual or a group. It involves the use of derogatory or offensive remarks, often in a public setting. Synonymous terms for this behavior include holler, booing, taunting, heckling, and hissing. Each term describes a different aspect of negative verbal response, but they all convey a similar disapproval towards the targeted person or group. These synonyms highlight the various ways individuals express their discontent or disagreement audibly, creating an atmosphere of hostility or social discomfort in public spaces.