hiss

verb

To make a sharp, sibilant sound, often expressing disapproval or characteristic of certain animals.

"The angry crowd began to hiss."

noun

A sharp, sibilant sound, typically made by a snake or to show strong disapproval.

"A loud hiss came from the speaker."

Thesaurus

Synonyms: boo, siss, sibilate, sizz, Bronx cheer, razz, razzing, snort, hoot, raspberry, bird, whoosh

Antonyms: acclaim, applaud, clap, spat