fizzle

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

(noun) a complete failure. Synonyms: flop, bust. Examples: "The play was a dismal flop."

(verb) end weakly. Synonyms: taper off, peter out, fizzle out. Examples: "The music just petered out--there was no proper ending."