A raspberry. A rude, sputtering sound made by sticking the tongue out and blowing through closed lips. It expresses disapproval or contempt

The opposition party speaker was greeted with Bronx cheers upon his arrival at the meeting

Il rappresentante del partito dell'opposizione fu accolto da pernacchie al suo arrivo alla conferenza

When he began to show anti-union feelings, he was greeted with Bronx cheers all around

Quando ha cominciato a parlare contro il sindacato è stato sommerso da pernacchie

It's believed to originate from the making of the sound during sporting events in the Bronx, a borough of New York City