define hissing
hiss - a fricative sound (especially as an expression of disapproval); the performers could not be heard over the hissing of the audience fizzle, hissing, hushing, sibilation noise - sound of any kind (especially unintelligible or dissonant sound); he enjoyed the street noises; they heard indistinct noises of people talking; during the firework display that ended the gala the noise reached 98 decibels