hissing

(noun) a fricative sound (especially as an expression of disapproval). Synonyms: hiss, hushing, fizzle, sibilation. Example: "The performers could not be heard over the hissing of the audience."

(verb) make a sharp hissing sound, as if to show disapproval. Synonyms: hiss, siss, sizz, sibilate.

(verb) move with a whooshing sound. Synonyms: hiss, whoosh.

(verb) express or utter with a hiss. Synonyms: hiss, sizz, siss, sibilate.

(verb) show displeasure, as after a performance or speech. Synonyms: boo, hiss.